I'd really like to buy an old, white TWENTY INCH iMac Intel Core 2 Duo 2.16 Ghz with at least 1 GB of RAM for around $900 shipped.
I'd also take a Intel Core Duo 2 GHz one, but I'd pay a little less, give that it isn't 64 bit.
Preferably, this would be done through eBay for security.