I bought a cdrom for labtop, a few cards, a LCD for labtop, all marked as it.
the lcd is defective (marked AS IS, but I took the risk.), but the other items are good
things to take care of:
shipping/insurance
return policy
item description (if it is marked "as is", then think about the rish)
seller's credit, read thru the feedbacks, check the dates and items of the feedbacks)
good luck