I don't exactly have any "vintage" instruments, but I'm guilty, nonetheless.
I have some newer guitars that are so "mint" that I'm reluctant to play them, as well as some 80's "vintage" Tascam recording equipment, that's so mint that I'd hardly want to touch it. Sometimes I buy two or more of a single item, for this and other reasons.
Is that a waste?

Should I be embarrassed to admit that?

Do I need help?
The oldest guitar I have is an '82 Ibanez Blazer, and that's not "vintage", is it? That Blazer is a well played axe, and I have some other well played '80s
Ibanez Roadstar II's, but I have some other newer guitars that are in like-new condition, in cases, that I hardly ever play.
The Tascam 246 is '85-86, and that's not exactly "vintage" either, but,... y'know, it's all relative.
Mint and mint-in-box items always sell best on Ebay, no doubt, and it's usually a good value. New-Old-Stock and Mint-in-Box are best tags for brand new, like new and new-old-stock items. I'm talking about music and recording equipment, eh.
I don't know. I'm ambivalent about it. You (I) want to play the brand new guitars, and maybe at the same time you (I) don't want to mark the guitar all up. Anyway, I like to break out different guitars, once in a great while, but I'll keep one simple, trusty axe handy, most of the time. I'll just play
the Squier Bullet, & keep it by the bed. I'll keep an acoustic (Mitchell MD-100), and currently an Ibanez SGR-200 bass. A guitar I kept around and played a lot has been
my Ibanez Blazer, & Roadstar II guitar and bass, but now even they're "collectible". Heh. Anyway, for the record, I always keep a few instruments around for playing. Some things don't get used much as others, but I try, and I have enough things that it borders on being a "collection".
I'm guilty. I'm probably obsessed. I admit I bought a new (used/like new) guitar very recently on Ebay, with this very idea in mind. I have my "pristine" guitar mainly in-case, & my "hands-on" guitar, of
exactly the same kind, for regular use. I don't see anything wrong with that idea, so I'm sorry.
