Upgrade duramax

Looking to upgrade about 18 years to a newer duramax. What would you folks do? The price of used (couple years old) is totally crazy right now. Sell my 03 before winter (don't need it in winter) and go without and hope prices become more reasonable next year? The way things are right now, and considering I put fairly low miles on it and take very good care of my vehicles, I'd almost be better off buying new and would get that extra few thousand back when I do retire from camping/boating. Wish I had a crystal ball on what the future holds but I don't. What's a guy to do? Thanks.