A mate took his H15 AML to an Bonhams Aston Martin Auction, and didn't get anywhere near a £1k reserve, just goes to show.
I sold a few and have a few on retention but never had a BHA plate .... yet!
It was up for £399, I grabbed that one and then realised I should have got WC66 ENG, by then DVLA had put a load of them up for auction, but think it only went for £3k ish? I'm putting it on a new car but will take £5k, which someone, one day, will offer.