Do you sell the stuff you don't really need or fill up your closets with it?

Selling gear is a sign of weakness. 

So, I keep that Audiolab, Burson power amp, Acoustech phono stage, couple of extra RCA cables and more blank SVHS videotapes than I need. Not too much, in fact.

Shortly before I retired I started using old equipment for trade in one my upgrades. It was great to get rid of all that stuff collecting dust. 

I've too much stuff! 

Better than too little.