A friend of mine is wanting to upgrade his iMac to the newest version so he's thinking about selling his old one on Craigslist or ebay. It's in good working order (no issues). What are these worth nowadays?: 20" iMac (model 8,1) 2.4GHz Core 2 Duo 1GB RAM 250GB Hard Drive OSX 10.5.8 Original keyboard/mouse No software disk or box/packaging It appears to be the stock low-end iMac that came out in 2008 and was discontinued in 2009. It would need Snow Leopard and more RAM in order to upgrade and get to Mountain Lion, which it could run if it had those two things. Thanks!