I paid about $850 for mine NIB about 7 years ago. I sold it for $700 2 years ago. I Would say your best bet would be to sell it online rather than trade it in. You just need to find the right buyer, they are discontinued and for those looking for them, they are not easy to find. While I find the Airweights far easier to shoot, you may not. That's why you should try and rent the 637/42/38 before you do any trading or selling. I would also recommended getting a pair of LG-105 defender laser grips for which ever you choose. It will really help with your dry firing drills and with live fire at the range.