I always cruise the classifieds, just for the helluvit, & one thing I noticed. Vintage Princetons are going for as much or more than vintage Twins. Now, the first amp I ever owned was a Blackface Princeton that my uncle bought new at Straub music in Syosset, Long Island for $55; around '67 or '68. It didn't sound all that great, but I remember it didn't even have enough power for garage jams back in the day. You definitely cannot use one for gigging, unless you are miked; most of the bands around here don't mike anything except the bass drum. So why all this Princeton love suddenly? For the same $$, I'd much rather have a Twin. Remember...you can dirty up clean, but you can't clean up dirty!