Hindsight 20/20 and I don't want to rub salt in your wound, but anyone who holds a HQL could have held them in safekeeping for you.
I'm not familiar with Cooter's, but if they're on the up and up, they would be willing to hold them for a fee and then transfer them back to you once this is cleared up. I would reach out and see if they would take $500 to hold on to your collection until the issue is rectified and you forfeit the money if you can't resolve the issue by xx/xx/xxxx
Hindsight would have been me leaving my collection with my parents in CA where my collection was perfectly legal.
I'm OK selling it since Cooter's clientele seems to be collector driven and I hope they go to a loving owner.