Looks like a basic burn deck. The pricy cards are the Goblin Guides, Chain Lightning and Price of Progress. Other cards may cost between 2 dollars to 50 cents depends on where you shop.
Personally, not a bad deck to start. I don't like Barbarian Ring but it could be personal preference on my own part, other players seem to like the nonbasic lands.
I do think you should check out this Legacy Burn thread:
I would get rid of hellspark elemental for Vexing Devil. Besides that, you're fine. The deck looks very solid. Flame Rift could be cut, or at least put down to 2, and you could try to fit in some number of Sulfuric Vortex and Volcanic Fallout. I think that could be strong, but its up to you.
I read that Vexing Devil is good but inconsistent. I'm going to cut Flame Rift for Sulfuric Vortex because Flame Rift scares me even though I'm getting attacked.
4 Goblin Guide
4 Hellspark Elemental
4 Keldon Marauders
Spell
4 Lightning Bolt
4 Lava Spike
4 Chain Lightning
4 Rift Bolt
4 Flame Rift
4 Fireblast
4 Price of Progress
18 Mountain
2 Barbarian Ring
I'm planning to buy this deck, I would like some opinions before I purchase it.
Personally, not a bad deck to start. I don't like Barbarian Ring but it could be personal preference on my own part, other players seem to like the nonbasic lands.
I do think you should check out this Legacy Burn thread:
http://www.mtgsalvation.com/forums/the-game/legacy-type-1-5/established-legacy/aggro/488613-burn
There have been a few additional upgrades to the deck that doesn't add much cost to the deck (as long as you stay away from the fetchland build)
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Edit: This is my deck for now.
4 Goblin Guide
4 Hellspark Elemental/Vexing Devil
4 Keldon Marauders
Spell
4 Lightning Bolt
4 Lava Spike
4 Chain Lightning
4 Rift Bolt
4 Flame Rift
4 Fireblast
4 Price of Progress
2 Sulfuric Vortex
18 Mountain