If you know a thing or two about computers, could you tell me if this is a good deal?

Oooh, very low system specs. If you don't try to run anything too new, you should be okay. Even office 2003 may be a bit much for this machine. Older versions of office and web browsers will probably be okay. I'm not sure I would run Windows on it, though. Also, it doesn't have built in wireless. He has an expansion card he plugs into it for wireless. He didn't say what kind of wireless either. Depending on how the wireless router is setup, it may not be compatible with your network.