Where is the best place to buy used macs?

[ILOVEMYMBP2.2g]

Hello everyone, I own a rental business and I own an imac and my son has a macbook pro at college and I just need maybe an old ibook g3 or whatever yall recommend to take with me on the road and show people a slideshow of tent pictures, i would really appreciate a quick response because i need to order it very quickly, thank you very much

 

[heatmiser]

For current models, the Apple refurbished section. For current and older stuff (like iBooks and Powerbooks), Mac of All Trades is a good option.