For context, I think a more comprehensive reply is warranted.
I set out intending to keep every bass I've ever purchased, but over time requirements change and an instrument acquired with good intentions often loses its appeal once it's tested in a gigging situation.
That said I only ever truly regret selling one bass - an Ibanez Musician MC 824 I sold to my brother in 1985 after he'd started playing bass. I sold it to him upon purchasing a '78 jazz (in '85), thinking... a) I only needed one bass and b) the Fender was better because...it was a Fender. I was wrong. In hindsight I should have kept the Ibanez because it was markedly superior to the jazz in every aspect. Neck through construction, well balanced, not too heavy, excellent fit 'n finish, and it sounded very good
(the growl with both pickups on full was better than any jazz bass I've heard since). Sadly, it was stolen out of his car a couple of years later - after a gig I might add
(rule #1 - NEVER leave gear in a car unattended)
On the other hand, here are the basses I don't regret selling:
- Vantage VA 900B ('80 - bland sounding; horrible neck-dive. Traded it on the Ibanez mentioned above)
- Ibanez MC 924 Fretless ('82 - v noisy preamp)
- Fender Jazz (MIA '78 - the one mentioned above; the less said about it the better)
- Fender Jazz (MIJ '62 reissue '05 - lacklustre)
- Fender Jazz (MIA 2012 - bought a Yamaha BB2000; made the jazz obsolete overnight)
- Sadowsky Metro UV '70 5 (2012 - sound with HC pickups was too compressed / bland; finish flaw; rear pickup died just out of warranty)
Lastly, here are the basses I'll never sell:
- Yamaha TRB6II ('03)
- Yamaha TRB6P ('92)
- Yamaha BB2000 ('82)
- Yamaha BB3000 ('84)
- Fender CS '59 Precision ('14)
- EB MM SR4 3EQ ('04)
I gigged the TRB6P yesterday on an outdoor folk-rock gig, and I'll be giving the Precision an outing over the next two nights at a festival playing 6 sets of jazz/pop/RnB. I'm really spoiled for choice at this point. I have every sound I've ever wanted/need for any imaginable gigging situation. My bass buying days are over.