Hi Stan, I am not sure exactly what your kits are worth. I guess whatever people are willing to pay for them. On eBay the old friction promo models which are the same model cars already constructed in colored plastic are going for around the $100.00 mark. I am also interested in airliner models, and purchased an old Revell 707 Astrojet kit on eBay for $50.00, when they usually go in excess of $100.00. It all depends on who is looking for the item at the time. If I were you, I would probably get rid of your inventory now, if that is what you intend to do, because I've noticed many of the old car models coming back, and if they bring back the Imperial, there goes your value. Just my thoughts, Bill '59 Crown