I hope this post is appropriate. If it isn't please just delete it. A friend has a Colt KEYHOLE magazine he will sell me. I don't need it now, but would like to have it anyway just because they are hard to find. Neither of us know what they are worth. I want to be fair with him, but also do not want to pay top dollar. (The mag is average used condition). He said to try and find out what they are worth and "he would be good to me". So, does anyone know what a fair price would be? Thanks.