Bought a jetglo 4003 in 2002 which was barely used (serial number is from 2000, home recording use only according to seller) without trying it first and fortunately it turned out very playable with a decent set up. First thing I did was remove the pick up cover and last year I had a push-pull retro pot fitted so it's the same as a current model. It's had reasonable use since but in the last 5 yrs or so the sound hasn't suited the bands I've been in so it's not my main gigging bass. One noticable thing is if I take it to an open jam session *everyone* wants to play it, they still have that allure. One guy I loaned it to for a set was practically in tears, he'd always, always wanted to play one and had never had the opportunity and I'd just made his dream come true. There's no way on earth I'd pay what they are going for at the moment though.