Still waiting for my pseudo bidders to chime in.
I think your $7k number isn't far off... new plastics and carpet is $3k all by itself!
The original prop and panel is a drawback... If I was bidding at an auction, I would likely be out between 5 and 6 K. Disassembly and transport... Paint before reassembly, snag a mid time engine... I would think you could end up with a $30k airplane for less than that invested.