The prices on most of the old Fender basses have gone through the roof over the past 10-15 years. They were getting kind of expensive in the '90s and '00s, but since then have gone way up. Frankly, unless you have money to burn, I would stay clear of a high-dollar vintage Fender if you're going to play it much. Many were great playing basses, but the prices aren't justified from a player standpoint.
For a basic "player", I'd look at Reverb for a used Highway One/Highway 1 Fender (they were Made in USA but no frills instruments to keep cost down) or Made/Crafted in Japan Fender (the Japanese Fenders are usually very good). The Standard Made in Mexico Fenders are not bad, but if given a choice between a Fender Mexican P-Bass and a Fender Japanese P-Bass, I'd look to the Japanese first.
Be careful on the newly-made Mexican P-Basses if you want a Rosewood fretboard. I believe they substituted Rosewood out for Pao Ferro on the Mexican Fenders when there was a dust up over rare woods regulations a few years ago. Not everyone cares, but some people are traditional and want the Rosewood.