I purchased this trans-blue Vantage 4 string bass last year sometime, with case. Paid about $225 at the time.
It looks to be an Avenger body style, but I have not been able to find the model in any of the online catalogs posted here and elsewhere.
What is interesting about this bass is it has a set of what look to be factory-installed Bartolini Bass pick-ups with chrome surrounds, which match up with the bright work on the rest of the instrument. None of this looks aftermarket, all looks original to my eye.
I will post some pictures here later for the Vantage sleuths to look at and wonder.
Any info would be not only helpful but amusing to me.
Photos are here:
Avenger Bass Pixs