If it were mine, and I do have plenty of sit and store room in my 0.4 acre barn, I'd strip all the interior parts, exterior plastic, lights and store the shell. If British Motor Heritage can charge £10,200 for a MGB Roadster shell then who know what someone will pay for a TT6 Supra shell in ten years time or twenty years time? I recon a pristine never knocked never been rusted shell would be well worth hanging onto.
It matters jack shit what you paid for it or anything else. If it cost £15k to put back together with good recycled or new parts it'd be worth twice that within a few years anyway. As the saying goes, two is company and three is a crowd. You only have a company of Supras at the moment, why not get crowded?