Thanks for all of your replies, everybody. I appreciate it. You all make some very valid points.
HFWR - Yeah, I learned that the Squires were the cheap version of the regular Precision bass. It seems from what I've read here and elsewhere, one can tell a difference in tone between the two, with the Squire not sounding as good as the regular Precision. You have a good point about going to a music store to try them out before I buy on a place like EBay.
mh - yeah, I've been looking on craigslist too. I like that craigslist is geographically "partitioned". If I do buy from an ad online, maybe I can save some money on the shipping charges if I buy from someone on craigslist who lives close by.
GatorBuzz - You asked why the bass. HFWR got it right - I perceive (correctly or incorrectly, I'm not sure) that the bass would be easier to become somewhat good at in a relatively short period of time. I've tried the acoustic guitar before and I find that you have to be somewhat of a contortionist to play some of the chords. Even though I do have long, lankey fingers (something I found to be an advantage in playing the piano), I struggle with the fingering. But in addition, I love the funk sound that a bass has. You, also, make a very good point about trying out different kinds at a store and talking with the staff.
devo - Really good point. I did notice on EBay that
older American P-Basses are pricey, reflecting your point that they retain their value. It's difficult for me to plunk that kind of money down because I do have a history of starting something and not following through (have to be honest with myself). But you make a good point in that if it sounds good I'll be more motivated to progress.
TromboneAl -
Thanks again, everybody.
EDIT: devo - since you teach the bass, maybe you can tell me what you think the chances are of a 41 year old becoming competent on the bass (no, I'm not a kid anymore). Also, I know it depends, but I was wondering if you could give me an idea of how much bass lessons might cost. Thanks.