Well, it's a game I'm talking about, not a system, but....
I bought SADX and SA2:B together for $30. =D Those are some of the best games I've ever played....and we got ahold of them FOR JUST $30!!!!
(I'm hoping to find a PS2 or something dirt cheap at a secondhand store or something, someday. I mean, if I ever did....there are a few games I'm interested in.(coughkingdomheartscoughtheneopetsthingcough) Just a few, so it's not worth buying one at full price. I'm keeping my eyes open. Maybe when the PS3 comes out, they'll be cheaper.)