Alot of the VINTAGE instruments you think the guys are playing on stage are actually copies. And it makes sense.. would you want to take a chance to damage a vintage guitar that is worth a large amount of money...
I beat the piss out of my basses, because to me they are just a tool to create music.. I typically sand ALL the finish off the back of neck and it becomes filthy from sweat and dirt within a few weeks. Because it feels better to me.
I have never owned a pre-beaten instrument until recently when I had a replica of Billy Sheehan's WIFE bass built. I play it because I have always wanted to play it and luckily it turned out to be the best sounding bass I've ever played. Only bad thing is there are some gigs that I can't play it because of the way it looks. Am I a "posuer" sure, I don't care.. I am 41 and I play 8 shows a week for tourists on a cruise ship and it's all cheesey cover tunes. I do retain a little self-respect cause I refuse to wear any cheesey hats !
One thing I can tell you about playing a beaten up instrument, it actually draws LESS attention. People overlook it and usually, for some reason, seem to avoid it. ( probably because it looks dirty, lol ) My guitarists just bought a new Mayer strat and he gets alot of people talking about how pretty it is.