How To Find Concertinas At Auction. in Buy & Sell Posted September 3, 2014 An auction site that I have found very good isThesaleroom.com It consolidates auction rooms from all over the UK and beyond.. You will usually find one or 2 concertinas there. At the moment there is well over a dozen since Gardiner Houlgate (auction house) have just published their catalogue for their qiuarterly musical instrument auction. They usually have a few Wheatstones and Jeffries in their sales.. but also Banjo's, Mandolins, Flutes and tons on fiddles.. you can go direct to their site and see what they sold in the past.. The saleroom also allow you to listen live to some auctions over t'internet and online bidding.. The ultimate time waster..