I am not sure if anyone here is familiar with Bring a Trailer (BAT). It is an auction site for all manner of collectibles cars. The audience is mostly US, but there is definitely a European presence as well. Anyhow, one thing I notice is that there is never an MGF / TF for sale on that site (well maybe once for an imported MGF with unclear documentation). It certainly seems to me to be a much better venue to list an MGF / TF than eBay.