Hi,
First off, the serial number tells that it's a very early Metro bass. Metro serials begin with M100 and M100 to M440 were built in 2004.
It seems to have 21 frets, which makes it a MV-5 model, but that's where it stops.
This bass probably had 2 humcancelling (or maybe even single coil) pickups à la Jazz Bass in it when it was born.
The previous user probably drilled out the pickup cavities to fit those current pickups in it, which seem to be Nordstrand Fat Stacks, Big Singles or Big Splits.
You can rule Big Singles out as the switches he added are probably for some switching system of the pickups.
Early Metro basses didn't have VTC as a standard feature, so originally, this bass should have 4 knobs (vol / balance / treble / bass) like the two upper knobs. Those upper two seem to be original. Where the third knob would be, he added a switch, and the fourth knob is where the last knob is now (near the output jack). My guess is that he replaced the two band EQ with a three band and added some additional features like pickup switching.
So, this bass is definitely not original. I assume that the pickups were changed and therefore the body has been drilled out. The electronics aren't original as well.
I don't know the price, but if you feel that it's a nice instrument with your voice in it and if it feels nice, I'd say why not. Just know that resale value isn't going to be spectacular on this one.
You might always contact Sadowsky
info@sadowsky.com. They are always happy to help.