Similar thoughts, except I built 8 master sets and I'm in the process of building a few more 2018/19 UD Hockey up till 2021-22 and I'm also trying to complete the 1974-75 O-Pee-Chee set. Sets I won't part with. All the modern slabbed stuff can go.
With all the shenanigans going on recently I do see an uptick in goats/vintage. The problem I have is that I refuse to part with more than $200USD for a single and that puts me out of Jordan, Gretzky etc. I can still get Brady and/or Montana for that - just.