I don't think anyone has focused in on the appraised value ($15,000 for the group). Does it seem right, or put it another way, is it likely to bring that in the open market? Seems high to me.
The other question, if these were to be sold, would be whether to sell them individually or as a group. Each has its advantages and disadvantages.
Hard to establish values in this area, but I think the appraisal is overly-optimistic. $6,000-$8,000 seems more likely.