Buyer's premium charge for motor vehicles is 12.5% +VAT on the first £300,000 so my maths make it an additional £4893 so about £37500.
Lsting fee is £250 +VAT and sellers commission is 7.5% +VAT for motor vehicles so the seller would have paid £3236 in fees, so taken home £29,389
I think the biggest winner here is the Auction House who gained £8100 in fees

Going to pop to my shed and see if I can find a wooden hammer........