"Best" requires opinion, "sniper" refers to how you use it, and "cheap" descries the user. Airsoft is a manufacturer. Please respect this site as the privilege that it is or risk blockage.
the utg master sniper but if ur on a bugdet a utg shotgun
Deff a sniper rifle
If you are just starting airsoft i would highly recommend an aeg, (airsoft electric gun) but if you are pro and experienced, a trained camouflaged sniper is the best, an invisible predator. However it does depend on the user of the gun. If you are asking performance wise then g&g makes the best airsoft guns on the market. (currently in the US)
http://www.airsocom.com/Airsoft/Replica_Models/Airsoft_M14/ right side
go for the m14, unless its cheap looking.
it depends on what you want to do. if you like airsoft then get an airsoft sniper. if you want a good paintball gun then DO NOT get one that looks like a military gun. in my opinion i would get a paintball gun. i would recommend $100 Azodin $250 proto rail $350 dangerous power G5 to me, these are the best starter guns. but before you buy a gun go to your local field and try it out to see if you like it.
upgraded JG BAR10, the gun comes stock around $110
It depends on the gun and the bi-pod. Some minor wobble can be expected from most airsoft guns.
airsplat.com's Well l96 spring rifle is the gun of my choosing
Yes, every airsoft gun can fire any gram of BB, although .12g BBs wont be that effective in a sniper, try .25g or even .3g.
It depends what you need it for. If you need a large heavy sniper for woodland get the l96. But if you want a light tactical sniper which is good for urban warfare aswell get the m50.
Nerf gun