What are the technical pitfalls in buying a pre-used iMac desktop and installing Snow Leopard on it? I have the 10.6.8 retail installation disk as well as original installation disks.

It will save me a lot of typing if I don't have to explain the reason for this question, but will do so if required.

A quick look around tells me that it will also save me a lot of research if kind members of this forum could highlight models to look out for.

Many thanks.