Don't know if this helps but click on the links below to see what Popsike is showing for the results of E bay auctions. These don't come up very often, so values may wildly fluctuate, dependent on who's got the cash. Of course with rarities like this, especially if in excellent condition, Manship might be the best bet. You must be aware that E Bay will take their cut out of these Values: Chubby Checker - Just Don't Know UK CP Demo, Ebay highest £886- Nov 2014 This was for an issue, no DJ showing Jerry Jackson - Rough out there UK CP Demo, £240 Oct 2012 Tony Middleton - Ends of the Earth UK Polydor Issue £622 Oct 2014 Personally my advice is, unless absolutely desperate, hold on to these rarities. Having been through the process of selling off my UK collection in the past, I know that I'll never be able to afford to replace such gems. Good luck anyway. Mick