At 'Mathewsons', you can reduce the amount that the seller actually gets by 7.5%+VAT commission and £35 entry fee as well. They also charge the buyer the same commission percentage + 1% if the bid was online.
I had also expected the ZT at 'Historics' to fetch more, largely based on prices achieved on 260s at their auctions before. 'Historics' charge higher fees too, 10% commission to both parties +VAT, and 1% extra to online buyers. Sellers entry fee is £250 +VAT.
David