(can of worms) ) that have sold, either ebay, privately, auction, etc.? insurance purposes at least you'd need some sort of benchmark to give to the insurance company... I know you don't get a good valuation if you let them do it... For insurance prices you need the replacement cost. Has to be documented. You need good photos of the item insured "before" and you need purchase receipts and/or documentation of a similar item on Ebay. Using Ebay is good because these tend to be retail prices. For oddball collectibles, which is what the insurance business considers a niche like vintage computers, you need a lot of documentation to back up your claims, bottom line. Also be sure your items have been stored at least 6 inches above the floor. I have a small policy with the expectation that I will not lose everything at once, and that it will be hard to get 100% of what I paid for anything. Forget about your labor. There is an older book by M Nadeau called "Collectible Microcomputers". The low prices are a reflection of the year the book was compiled, but the book helps establish a valuation trend, a point of reference in time. It would be nice if this were updated. Bill