Tom,
With all the very kind offers to help, just do it at your house and have fun with it. but if you are going to just sell it don't waste their time.
Steve O'Brien (no relation but I like the way he thinks) said it best.
All the shipping back and forth, hold harmless agreements and stuff is now most likely a waste of time and money. After all that you have said and written and with all this bad feeling it doesn't seem like you could have a happy ending going the return to JPS route. This is if you wanted to keep the car.
Of course if you just want it fixed and then to sell it, let John Steele have a chance to make it right and sell it at his shop like IM does. Henry re brokers his older builds for customer's all the time. And John has potential buyers at his shop all the time I was one of those visitors/buyers.
In fact that might be the best solution to this freaking nightmare. Just don't waste all the SOC good will that has been sent your way. If you are just going to sell it, don't waste the time of the guys who volunteered to help.
I ended up buying a used IM because it had rollup windows a class name
and I could alter and wrench it for fun. From reading your posts it sounds like you really wanted a turnkey and for the $$$ you paid you deserve it. And I do feel sorry for your sad sad story and would love for it to be resolved in your favor.
Let John repair it and broker a sale (if possible) then buy a Beck or factory built sports car.
Cheers
Dave