I always give my opinion of equivalent replacement. What did they value it at last time? and what if any improvements have been made, added to market de/appreciation over the last 12 months? For my old tintops it's simple replacement value of a few hundred to a few thousand,for the Mog, I wouldn't necessarily drop below purchase price, unless market forces dictate otherwise vs probability of having to sell? They're only ever worth what someone's willing to pay for them in money terms, but always priceless to their keepers!!😁