You might consider buying some dyno time to put an hour or so on them. That would give you some useful engine information as well as making sure there aren't any oil or coolant leaks.

Thanks for the info! I have heard of Blower motors going 600 Hrs but it seems this is a rairity rather than a norm. I guess if I took the time to remove them it would be better just to have them freshined a little especially the valve train. I appreciate the responces and this will help me in my purchase decision.