Muktol

Most of my "normal" decks are out of the budget for sure. But pauper is a great (and cheap) format, so here are my pauper goblins:
http://www.mtgvault.com/muktol/decks/br-pauper-goblins-2/

I would change from 4 "Flames of the Blood Hand" to 2-3 "Browbeat" and 1 additional "Shard Volley" and/ or "Magma Jet"
"Vexing Devil" might also be an option instead of "Goblin Guide"

I you're going to play on tournaments then I would also switch 4-8 lands for "Arid Mesa" / "Scalding Tarn"

I you're up against many non-basic land decks then I would choose "Blood Moon" for my sideboard

Greetings
Muktol

Some suggestions, based on my monoB vampire deck (http://www.mtgvault.com/muktol/decks/vampire-onslaught-revised/)
Blade of the Bloodchief ({1}; Equip{1}; Whenever a creature is put into a graveyard from the battlefield, put a +1/+1 counter on equipped creature. If equipped creature is a Vampire, put two +1/+1 counters on it instead.),
Mimic Vat ({3}; Imprint - Whenever a nontoken creature is put into a graveyard from the battlefield, you may exile that card. If you do, return each other card exiled with Mimic Vat to its owner's graveyard. {3}, {T}: Put a token onto the battlefield that's a copy of the exiled card. It gains haste. Exile it at the beginning of the next end step),
Bloodghast ({B}{B}; 2/1; Bloodghast can't block; Bloodghast has haste as long as an opponent has 10 or less life; Landfall - Whenever a land enters the battlefield under your control, you may return Bloodghast from your graveyard to the battlefield), Kalastria Highborn ({B}{B}; 2/2; Whenever Kalastria Highborn or another Vampire you control is put into a graveyard from the battlefield, you may pay {B}. If you do, target player loses 2 life and you gain 2 life), Vampire Hexmage ({B}{B}; 2/1; First strike; Sacrifice Vampire Hexmage: Remove all counters from target permanent), Viscera Seer ({B}; 1/1; Sacrifice a creature: Scry 1)
Dismember ({1}{PB}{PB; ({PB} can be paid with either {B} or 2 life.) Target creature gets -5/-5 until end of turn), Tragic Slip ({B}; Target creature gets -1/-1 until end of turn. Morbid -- That creature gets -13/-13 until end of turn instead if a creature died this turn)

Is there any reason why you are using the same cards, but from different editions?

Greetings
Muktol

I would remove "Devil's Play" for 2 additional "Magma Jet", 1 "Grim Lavamancer" and 1 "Mountain"

Greetings
Muktol

If it would be my deck I would do the following changes:
-4 Contagion Clasp
-3 Trigon of Infestation
Sideboard "Pistus Strike" (-1)
Sideboard "Viridian Corrupter" (-4)
+4 Rancor
+2 Ichorclaw Myr
+3 Blight Mamba

If it's only for protective reason of your own creatures "Vines of Vastwood" could be changed to "Ranger's Guile"

Some suggestions, based on my monoG infect deck (http://www.mtgvault.com/muktol/decks/monog-infect/)
Bonesplitter ({1}, {1} to equip; Equipped creature gets +2/+0), Signal Pest ({1}; 0/1; Battle cry; Signal Pest can't be blocked except by creatures with flying or reach), Evolution Charm ({1}{G}; Choose one: Search your library for a basic land card, reveal it, put it into your hand, then shuffle your library; or return target creature card from your graveyard to your hand; or target creature gains flying until end of turn), Rancor ({G}; Enchant creature; Enchanted creature gets +2/+0 and gains trample. When Rancor is put into a graveyard from the battlefield, return Rancor to its owner's hand), Ranger's Guile ({G}; Target creature you control gets +1/+1 and gains hexproof until end of turn.)

Greetings
Muktol

OK, then I would play this as "simple" goblin deck with an alternative wincon.

-3 Akki Rockspeaker
-2 Mogg Sentry
-3 Raging Goblin
-1 Goblin King
-1 Devil's Play
=- 10

+2 Goblin Wardriver
+2 Warren Instigator
+1 Krenko, Mob Boss
+1-2 Siege-Gang Commander
=+ 6-7

Sideboard "Vexing Shusher"

Suggested cards for the free slots (mostly based on my monoR goblin deck (http://www.mtgvault.com/muktol/decks/monor-tribal-goblins/))
Shared Animosity; Purphoros, God of the Forge; Infiltration Lens; Freed from the Real; Searing Blaze

"Shared Animosity" works very good with many creatures of the same type, as intended with a tribal.
"Freed from the Real" can do some real sick stuff with Krenko
"Infiltration Lens" can make it a real tough choice for your opponent to block or not to block acreature...e.g. "Warren Instigator" + "Infiltration Lens"

I would remove 2-3 "Bloodline Keeper" and add something like "Blade of the Bloodchief" or "Vampire Hexmage". The Keeper can be strong (if you control 5+ vampires) but he has the same manacosts as "Vampire Nocturnus". Nocturnus is far better than the Keeper as he gives +2/+1 and evasion in form of flying.
I also would add some searchlands (or fetchlands if you can afford) to thin out your landbase and give "Bloodghast" a higher chance of coming back.

Greetings
Muktol

Why no {B} Goblins? You might miss some nice ones like "Festering Goblin", "Frogtosser Banneret", "Warren Weirding" and "Boggart Birth Rite"

Some suggestions, based on my B/R modern goblin pauper deck (http://www.mtgvault.com/muktol/decks/br-pauper-goblins-2/)
Battle-Rattle Shaman ({3}{R}; 2/2; At the beginning of combat on your turn, you may have target creature get +2/+0 until end of turn), Caterwauling Boggart ({3}{r}; 2/2; Each Goblin you control can't be blocked except by two or more creatures. Each Elemental you control can't be blocked except by two or more creatures), Stingscourger ({1}{R}; 2/2; Echo: {3}{R}; When Stingscourger enters the battlefield, return target creature an opponent controls to its owner's hand), Goblin Grenade ({r}; As an additional cost to cast Goblin Grenade, sacrifice a Goblin; Goblin Grenade deals 5 damage to target creature or player), Dangerous Wager ({1}{R}; Discard your hand, then draw two cards)

Greetings
Muktol

The question is, do you want to have "Dragonshift" as main winoption or as alternative to goblin beatdown?
If you want it as main I would add a 4th copy of it and add something like "Infernal Plunge" to boost my mana.
If it should be an alternative winoption then you can remove some of the goblins for other/ better ones (e.g. "Akki Rockspeaker" or "Raging Goblin")

Greetings
Muktol

I would switch from "Blood Funnel" to "Semblance Anvil" as it doesn't have the drawback of countering your own spells if you can't sacrifice a creature (which might easily happen in this deck)
I also would sideboard "Exsanguinate" as it is useful in multiplayer games, but one on one it is far to expensive. Either add a 3rd burn spell or some more carddraw.

Greetings
Muktol

I would remove 2 "Huntmaster of the Fells" as it has a strong anti-synergy with "Immerwolf". I would either add some equipment (e.g. "Infiltration lens" for carddraw) or some removal (e.g "Searing Blaze") as replacement.

Greetings
Muktol

Just be aware that "Mentor of the Meek" and 2+ "Honor of the Pure" will stop your carddraw-engine

Greetings
Muktol

Werewolf normally are built modern-legal, so I would remove "Dark Ritual".
From what I have experienced they are pretty fast and can hit very hard (30+ damage with trample by 2 creatures) so you also have to be very fast, or have a good defence until you bring your own heavy hitters. But following both strategies won't do a deck god.

Here are some links which might help you:
Deckbuilding Tutorial: http://www.mtgvault.com/muktol/decks/how-to-build-a-deck/
B/R Vampire deck: http://www.mtgvault.com/muktol/decks/br-tribal-vampire/
G/R Werewolf deck: http://www.mtgvault.com/muktol/decks/gr-tribal-werewolfs-2/

Greetings
Muktol

Some suggestions, based on my monoW pauper equipment deck (http://www.mtgvault.com/muktol/decks/monow-pauper-equipment-2/) and ma monoW Kor equipment deck (http://www.mtgvault.com/muktol/decks/monow-kor-equipment/)

Basilisk Collar ({1}; {2} to equip; Equipped creature has deathtouch and lifelink), Bone Saw ({0}; {1} to equip; Equipped creature gets +1/+0), Bonesplitte ({1}; {1} to equip; Equipped creature gets +2/+0), Cranial Plating ({2}; {1} to equip; Equipped creature gets +1/+0 for each artifact you control), Swiftfoot Boots ({2}; {1} to equip; Equipped creature has hexproof and haste)
Horned Helm ({2}; {1} to equip; Equipped Creature gets +1/+1 and has Trample), Leonin Scimitar ({1}; {1} to equip; Equipped creature gets +1/+1), Sylvok Lifestaff ({1}; {1} to equip; Equipped creature gets +1/+0. Whenever equipped creature is put into a graveyard, you gain 3 life)

Greetings
Muktol

*like*
I would remove "Scorned Villager" and add either a onedrop like "Young Wolf" or some removal like "Searing Blaze".
The villager misleads you to cast more spells, which can be a bad idea if you don't have "Immerwolf" out.

Also "Overrund" could be replaced with a buff/ protection spell like "Vines of Vastwood". From my experience it is not the mass of wolves that is dangerous but 1-2 single creatures (A flipped and buffed "Kruin Outlaw" for example), and it is good to have something to protect these.

Greetings
Muktol

If you want to stay aggressive, remove "Bloodline Keeper". He has the same mana-costs as "Vampire Nocturnus", but is not as good. Yes, he can support you with 2/2 tokens, but with one or more Nocturnus out you shouldn't need them.
I would fill the free slots with 2 "Vampire Nocturnus" and either 1"Sign in Blood"/ "Read the Bones" or 1 "Blade of the Bloodchief".
If your budget allows, I also would add 4-8n shocklands ("Marsh Flats" or "Verdant Catacombs").

As for you sideboard, 15 cards are maximum. I would remove "Bloodchief Ascension" as you don't have anything that makes him discard. Also "Pain's Reward" could be replaced with "Read the Bones". If you are going after a lot of planeswalkers "Vampire Hexmage" might be worth looking at.

Greetings
Muktol

I'm missing some of the best and aggressive werewolf's there are, like "Huntmaster of the Fells", "Immerwolf", "Instigator Gang", "Kruin Outlaw", "Reckless Waif"

Question is, do you want to get this deck competitive (and a little bit more expensive), or stay in the 'fun' area?

Greetings
Muktol

I don't want to offend you, but you might want to read http://www.mtgvault.com/muktol/decks/how-to-build-a-deck/
Short version: There are way to many cards in this deck, and way to many different cards, to play continuous.

Greetings
Muktol

The advantage of buying/ trading cards direct from a trader is that you get what you want to. And not every good card has to be expensive!

Some suggestions (and prices) from my G/W pauper enchantment deck (http://www.mtgvault.com/muktol/decks/gw-pauper-enchantment/)
Silhana Ledgewalker ({1}{G}; 1/1; Hexproof; Silhana Ledgewalker can't be blocked except by creatures with flying, ~0,70$ per card)
Ethereal Armor ({W}; Enchant creature; Enchanted creature gets +1/+1 for each enchantment you control and has first strike; ~0,50$ - 2,00$ per card), Forced Adaptation ({G}; Enchant creature; At the beginning of your upkeep, put a +1/+1 counter on enchanted creature; ~0,50$ per card), Hyena Umbra ({W}; Enchant creature; Totem armor; Enchanted creature gets +1/+1 and has first strike; 1,50$ - 2,00$ per card)

Greetings
Muktol