Long story short, in 1981 I paid $200, plus my Fender Mustang, for a slightly modded '75 Jetglo 4001 (w/Badass II). It was the best $200 I ever spent, as its still one of my main basses!
In the mid-late '70's/early '80's I distinctly recollect new 4001's selling in the $750 - 800 range and...