Low budget, just for fun

So I'm lookong to buy my girlfriend a stereo for christmas. Here's the catch: I'm trying to piece together a receiver, cd player and speakers, all used for a little more than the price of a boom box from say, best buy or whetever, but it has to sound way better than said boom box. I found an onkyo receiver ($45), sony dvd / cd player ($45), and some infinity sm 122 floorstanding speakers ($75 with crappy rca receiver, going to offer $50 for just the speakers). Anyways, this is actually pretty fun trying to piece together the best system you can for the least amount of money possible. Anyone else out there do something similar? It would be interesting to have an audio show with a $200 system limit and see who could come up with the best sound!