Ahhh... I missed the battery compartment.
Flip the switch and see if the neck lights-up. If not, remove the cover from the back of the bass, replace the batteries and try it again.
Turn all the knobs back and forth from fully clock-wise to fully counter clock-wise. One should turn freely: that's the volume knob. If the other 3 have an indent (a bump) in the middle, that means 1 is a pan control and the other 2 are tone (bass and treble) controls. If all that is the case, you have Epic electronics.
The bass has a Spoiler shape and the posts above indicate that the neck is Vermilion and Mahogany. Those woods will give the bass a voice fairly distinct from most Spoilers. Since the body is painted, I don't know an easy way (other than waiting on the build card) of determining the body woods. Normally I would guess Mahogany with a Maple top, but Adam's basses always had unique wood configurations.
The last issue is the scale: measure from the nut to the 12th fret and double the number: that is the scale length. Most Spoilers are 32 (Medium scale).
Used Spoilers typically sell for $1600-$1800, but Epic electronics would be considered a down-grade. However, the LEDs would be an up-grade. The paint job (as opposed to a natural finish) may make it more valuable to some... less valuable to others. The front mounted control cavity cover is another feature that some will like and others won't. I don't know how much it will ultimately bring, but you shouldn't have any trouble selling it.
