3 basses I am considering

I would say that all of those are around the same quality. I've played them all at one time or another. It just depends on the bass you like the tone and feel of the best. Only you can determine that.

 

If you think you might sell it later, the Fender and MM will probably hold their value better than the Schecter. If you're a buy-and-hold type, then don't worry about this aspect.

 

Definitely check your local Craigslist and the TB classifieds, used is really the only way to go IMO

 

I've tried the Fender Blacktop Precision and it is a really nice bass. I'd be more apt to go with a Blacktop Jazz though as the tone was much nicer IMO. Although it wasn't on your list they sell for the same price.
The Schecter is nice as well but(as has already been stated) will not hold the value like the others on your list.
I've got a Fender Deluxe Active P and love it. Mine is a 2006 model so it has the humbucker so the tone is different on the bridge pickup. Other then that, the new ones seem to be great basses.
I've never played a MM so I can't weigh in on that one.

 

Based on past experiences at Guitar Center............................ I'd go with the Stingray.

 

From my experiences, schecter is not worth it whatsoever. I'd say go with the precision, i feel as though it always is present and sits right in the mix.