You may want to try re-running the auction, but start bidding out at a low number. Maybe something around $5,000. Action seems to cause action on the auctions. You can still set a reserve, pick the lowest cash price you would take. I think this might get the cars to go, I've seen it work before.
Shiny Side Up!
Bill
'72 442 "Inamorata"
www.FQuick.com/ProTouring442