Offshoreonly.com - 1988 38' KV Scarab

Need some feedback. A family member has a 1988 Larry smith flat deck Scarab that he needs to sell. It has twin blown 502's, not sure horsepower.
New gaffrig gauges and dash, interior, and stereo. It has a custom paint job labled probable cause. I believe it has Huber tranny's and trs drives. Comes with a triple axle trailer.
He has come into some financial difficulties and he can not maintain and run the boat anymore. Problems with the boat is that the carbs are not tuned right at idle and one motor keeps dying. Also there is something wrong with the wiring because he keeps having batteries dying on him.
Just curious what would be a fair price to get out of it as it sits but not give it away.
I will try to get some pics.

Thanks,

Finman