Not originally, but the stable of instruments I've settled into, each member has a unique character one way or another, so although it's not exactly "sentimental" like an heirloom or something I feel like each is an aspect of my bass "voice" and I can't see selling them, even if I'm not playing all of them as much. I don't know if "sentimental" is the word or if it's more like they're "personal" and unique. I like jazz basses but I just don't get excited about playing a basic J bass off the rack.
"Def Cats" is my Carvin SB4000. The name refers to how I got it; with the consolation-prize money from being on Jeopardy. It's become my main player, and with the story for how I got it, how could I let it go?
"Batgirl" is my Yamaha BB415. It has Adam Hughes' autograph on it (the artist who did the Batgirl image). That's a unique thing.
"Looney Toon" is a custom five-string by Kansas City luthier John Toon. Definitely my best bass for feel - so light and perfectly balanced, great neck.
The other two basses don't really have names - the Godin A4 is both an ABG and fretless, so it kills two birds with one stone, plays and sounds great, and is my main bass to use in church. The other is a LPB parts bass, P body and J neck, both MIM Fender components. I suppose that's the least personal of my basses, but we all know you gotta have a basic P bass, right?
I have sold the Squier bass VI. It was great, I just wasn't using it and needed money for other gear. Otherwise I still use everything in this picture.