My son is saving up for a computer of his own to play videogames on. He has his heart set on an Alienware Sentia 223 on Ebay for $299 used but we're leery of buying something like that from Ebay - the vendor has about 100 reviews all positive but still... So does anyone here have recommendations? I looked around local listings on Craigslist. But my experience is more with buying computers for office applications and I don't know as much about what requirements there are for gaming. My son says it needs to have Steam so he can play Minecraft. Ideas? Thanks in advance!