Decide if you wan to sell them now or later. If now then get really good photos of them. A photo, front and back of each that are the same.
Sent the photos to the buyers that you are interested in doing business with. Make certain the buyers have current good feed back.
Buy or borrow a postal scale and determine if its time to sell. Also the cpu's you have a good but I didn't see the i860 listed on one of the buyers but I am certain he would give you a price. 73, Mike