Especially dont buy it, if it says IBM, that means it is at least a couple of years old. As 92merc said ibm personal computer stuff is all branded Lenovo now. Same model names and number, but IBM sold the hold division over...
We have a huge contract with IBM so all our stuff is now ibm/lenovo at work. Desktops and monitors are ok, but I agree the laptops are a pita, my wife's dell is much nicer and cheaper to acquire, even with our "deal".
Andrew