Sorry you are having a hard time selling, and sorry about the BAT debacle.

One factor is verts are not sedans or coupes. First, lots of lower mile verts, comparatively, as they were almost always the second "toy" car, as opposed to the primary transportation. And coupe and sedans appeal to more of the masses. You can look at convertible E36 M3s, convert E46 M3s, and even M Z4s coupe/roadsters and see the pattern. Add the seasonal factory to the mix now too, plus the holidays is the worst time to sell a car. Tax return season is the best!

Posting some photos, or even link to the BAT auction would help too.

Good luck, if you're patient, you should get a fair price for what is undoubtedly a nice ride!