Regarding Billy Arnell, in the current market, I'd have thought £1,500. The most recent (and expensive) on Popsike was in October 2013 and that was about £1,300 ($2,025). Not too many copies listed there and doesn't come up for sale on the open market very frequently so there could be a fair bit of demand built up. In an auction situation with John Manship - £2k plus perhaps? Just my opinion and I know it's sold for much less in the past. By the way, there's an old photo somewhere in the SS gallery of Chris Plant and someone else (can't remember who) together each holding up their copies! (P.S. - just found the photo!)