Lately I've been seeing a lot of ads up for Fender p-basses circa 1970-79 at values between $3500-$7000. I suppose you could get a good one but are people over valuing these things? They obviously have the right to ask what they want to but I have trouble believing the basses are worth the price I ask out of curiosity as I've never played anything older than an '86 and to me it wasn't any different than my 2015. Does anyone have experience with 70's vintage P's? Am I missing something?