Let's see, if I didn't sell/trade in amps I'd still have these plus my PRS amps, all owned from new:
1966 Ampeg Reverberocket II (two; I used one for combo organ and one for guitar, or sometimes stacked both for organ).
'67 Fender BF Bassman head and cab. My #1 for a long time.
Early Mesa Tremoverb combo.
Mesa Subway Rocket combo.
Mesa Blue Angel Head and Cab
Mesa Maverick combo.
Mesa Bass 400 + and Road Ready 4x10 with tweeter cab.
Mesa Mark V head and Mesa Recto cab.
Mesa Formula Preamp
Mesa Stiletto head.
Egnater TOL 50 combo.
Bogner Metropolis head and matching Shiva cab.
Bad Cat Hot Cat 30 and Bogner Oversized 2x12 cab.
Two Rock Onyx and Two Rock cab.
Two Rock Onyx Sig Prototype
Two Rock Onyx Sig
Two Rock Custom Reverb Sig
Two Rock Custom Reverb Sig v.2
There's one other Two Rock I had for a while and for the life of me I can't remember the model.
Roccaforte Rockie head (well, my son has this one and it's a great AC30 tone with a little bit of 18 watt Marshall blended in depending on how you set it).
There are a few amps in addition to the above that I had for a 24 hour approval period and returned to the store. Some were really nice amps, but not for me.
Now, do I wish I still had all of them? No. There would be a ridiculous amount of overlap and some I just don't think about any more at all. I would not be interested in returning to most of them. However, I kinda wish I still had a select few to play now and then. Here are the ones I'd like to have back:
Tremoverb, Mark V, and Bass 400+; Hot Cat 30; Two Rock Onyx Sig; Roccaforte Rockie (technically still mine but on more or less permanent loan). So six out of 21 former amps.
And of course, I'd also keep my DG30 and the HXDA 30 that's on the way. So, no more than 8 amps, even if I kept everything I really loved. 8 amps is a lot of amps, for me. I had 6 at one time, and it wasn't too bad. The nice thing about amps is that they hardly need any maintenance, and don't take up too much room unless you are Aristotle, who evidently needs a warehouse for his collection of amps.
However, once everything settles down and I have my PRS amps on hand including the 30 Watt HXDA, I may revisit the amp thing. I still have a strong pull for an AC30 style amp.