Re: AUCTION
MG personally donates an autographed pair of the gloves he caught the game winning snitch in during the last Scottish Cup. The Magpies as a team have also sent a few items for auction, using MG as their representative (okay he may have needled their PR staff that it'd be a good idea to donate to this). A few packages for exclusive opportunities to meet/greet/train with the team along with a very limited edition kit from way back to the team's 200th anniversary.
Other than the scottish spellbooks, MG bids on a few more things but mostly it's to poke at the pride of the more pureblooded families and get them to increase their bid not to lose face to some upstart quidditcher.
What? It's all for charity.
Of course one does call his bluff and lets him win, but he shrugs, smiles, and takes the win as if he really did want the 14th century quill holder all along. Who knows, maybe mum had room on her desk for one.