Precisions are funny things. They're currently less popular than Jazzes, and more of them were made of course. I purchased a 63' all original and in great condition for £4200 this time last year, and that was from a dealer.
If I were buying it for investment value, I'd make sure to buy an original bass. If it's to play, or for recording etc. then it doesn't matter.
I use a 73' Jazz which has a replaced set of pickups and pots which gives me the oomph I need.