Oh... I see. Well in that case OP, just go to redwolf or something and buy yourself whatever you want.
TM is always good and you're guaranteed a quality product with tight tolerances and will last you forever (unless you break the body in which case just buy a new metal one). Below I've posted a link to the TM MP5 guns they're in your price range and if you want to make it shoot faster/harder all you need to do is buy a $10-15 spring (don't go too hard though since the internals are likely to break with too strong of a spring).