It would help if you could find out the model, the serial number, whether its a Bb or C soprano, whether its in Low pitch ( standard 440 hz) or high pitch. some pictures and a description of how it plays and if there is any damage etc will help determinr its value.Need some advice. A guy over here at the Netherlands offers me to take over a Couesnon soprano for €450,-. The sax is in good shape. But what is a fair price?