FS: Mac Mini $600

I’m looking at picking up a Mac Mini from a guy at work to try a couple programs on, but then will be needing to sell it again. It is the better of the two Mini’s (1.83 Core duo, 80GB) and has the ram upgrade to 1GB. It’s only like 2-3 months old and he has replaced it with a macbook pro, so that is the reasoning for getting rid of it. Includes computer and cables, no mouse/keyboard/monitor. I will be looking to get exactly what I pay for it, which would be $600. It retails new for over $850 I believe. I will only need it for a day or two to test a project, then it will be set to go to it’s new home. The thing is, I do not want to buy it if I do not already have it sold when I am done. This isn’t really a make offer sale either as the price is pretty firm. Let me know so I can get this asap. Thanks