according to the NADA guidelines a normal trucker would sell for 300-600k.
Now, 3 years ago we saw prototype cars that were displayed in the 1950’s going for a million plus. In the last 2 years these cars have been selling for under a million. The big issue with Benchmarks convertible is that it was never complete and was never shown. If it was complete, and was shown at automotive shows back in the day and if it was 3 years ago, then you might be able to get + a million on it.
… but who knows …. a couple of folks with deep pockets may bid it up…..