I regret selling:
Ibanez Jem FP '89 (with Vai's curtains on it, great bedroomguitar :lol:)
Yamaha SG700 (very heavy, though pristine tones, lots of sustain)
Peavey Tweed 4x10 (cleans really good, overdrive could have more punch/dynamics)
Rivera R55 (speaker could not handle the lows, should have replaced that one...)
Acoustic G100T-amp (my first expensive tubeamp sounded not bad at all and sort of collectible now)
Fender Princeton Reverb II (collectible now, great 18 watt amp).
I regret buying:
Yamaha SG500 goldtop (Taiwan I suppose), nowhere near the old SG's.
Ibanez Les Paul-copy (impulsive buy, not much mojo)
Gibson MIII (didn't like the pickups after all)
Fender Vibrosonic (wasn't reliable)
Koch Multitone 2x12 combo (lots of gain, but not much tone, clean channel good, drive ok, highgain-ch. pfff...)
T-Rex Mudhoney - overdrive + boost
Cool Pedals Dirty Devil: drive + boost
and more pedals