My son and I just started playing div 1 together

I bought the season pass when it first came out, but after they nerfed a bunch of my weapons and gear I stopped grinding for the newer sets and eventually quit playing. Fast forward almost 10 years and now my son is getting into it, so we’ve been grinding together trying to find good loot. I’m definitely rusty, but it’s slowly coming back. Does anyone have tips on the best places to farm gear/weapons now or which vendors are worth checking these days?