With all factors being equal (if true), I’d be inclined to spend the extra $50 for the MIA.
When you say USA or MIA, can we assume you are speaking of the American Series, American Standard, or whatever pro instrument that Fender was calling it that year? I'm not sure if there was a Highway 1 or American Special made in 2001 which, in my opinion, would be about on par with today's MIM. If Am Series or Am Standard then yes, MIA all day long. Resale on any MIA is going to be better either way if that's your concern though.
This.The thing I don’t like about new MIM’s is you don’t know if the neck will be stable. A used bass gets around this - if the neck on the used USA is straight, and the frets are in good shape, buy it.
Nothing wrong with pickups with ceramic magnets IMO and IME. Did you have your bass properly set up? That could possibly have cured the thin sound.
the new MIM is $600, and the used American is $650.
The premium (Am Series/Am Standard) will have the truss rod adjuster at the heel and will have a string through body.Good question. I'm pretty sure the MIA is the American Standard. I'm not seeing a special series noted anywhere. I would assume that's mentioned on the headstock if it is a special series?