original pooh drawings

[c.windsor10]

hi there i own a set of 8 hand drawn model sheets for winnie the pooh and friends by mike royer each sheet shows exactly how to draw each character there is 1 charachter per page and at a guess id say there 20 inch by 20 inch (no tape measure to hand) these were the original designs by mike for pooh which were then used by the disney artists to replicate the characters there are hand written details on them by mike on how to draw them and how to scale them

the reason for my message is im trying to find the current value of these drawings and also where the best place to market them to sell on would be or even if you may know an interested party

thanks for your help