Its probably not a fender, but it is still a bass. If it is playable and sounds decent it is likely worth from $100-$150.
$100 would be a decent offer.
You can get a new SX for about $100.
Why would you want a beat up old bass pretending to be a fender, with a bunch of mismatched pickups, likely of unknown quality and condition.
I'd say $20 is more reasonable.