A bit of a generalized question. I see prices all over the place on Olds ambassador cornets. In my case I bought one reasonably inexpensive a couple of years ago off craigslist and cleaned it up (eg. took it to a shop to get any stuck slides, unstuck, replated the mouthpiece which was original with it and just made sure it was in good order.) The other day at my private lesson my instructor borrowed a cornet from a friend, and the short of it is that my local pro that I take lessons with got really super excited to think about buying my Olds ambassador although it is not something that he would probably typically gig with, but he was a bit way too excited to get it. (When he was young he had a couple and got rid of them and now like many trumpet players wish they had "THAT" horn whatever that translates into that they sold or got rid of growing up.) Some questions: 1. What is a reasonable price to ask? (I've thought about maybe trying to trade for some more lessons. or just cash or cash / lessons combo ) 2. What is the background / difference between the various makes/years of the Olds? E.g. with bach some people may say you really want to buy them between years x-y but stay away from models produced in xxxx years. Of course I'm already having sellers remorse because it isn't worth a lot of money but it is a nice novelty to have and my only cornet so if I get a 'new' cornet at some point may need to figure out what to put on the wish list. Ideas?