I have a limited edition Stephen Doig tribute to the Busby babes. It is the munich tribute and is very large and is hand signed by the artist and is numbered 23 out of 400. I have searched high and low but cannot trace any other in this range. I know it is hard to judge without seeing a picture but it was won in a charity raffle 8 years ago and the previous owner was a huge United fan and valued it at £500 a the time.
Where could I find out it's value, any help much appreciated
Thanks in advance