At a minimum, you could assume the stamps and coins were worth their stated value so that would be a starting point. You could then do some research to determine what the average appreciation of similar collectibles was and work backwards from the price at the sale date to estimate a cost basis. If your calculations made good sense it may suffice.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
