I haven't played bass for....let's see... decades. So other than feel and my personal listening experience I know next to nothing. I've been wanting a bass for awhile now and found a used 2010 Squier VM 70's Jazz bass that felt really good in my hands. They said it had "upgraded pickups" but couldn't tell me what they were. I was curious so pulled them out to see. Installed in the neck position was a label "JB101B (bridge 1006)" and in the bridge position an umarked pickup, but the base plate looked nearly identical but nothing really saying what it was. I know from the marking that whatever is in the neck is a Seymour Duncan, but beyond that I know nothing more. I guess the questions concern what these pickups might comparable to and if I wanted to change them out what could I buy that would be a REAL and reasonable upgrade for a used bass that cost less than $200? At this point it is not critical because I have to get a decent bass amp first, but I want to be able to plan and budget. Thanks in advance.