How much is a 8.75 worth now

Ballpark $1000-1200 IMHO.
If your car's VIN has a letter H in the fifth position it would be an original 340 car, and likely the original housing and possibly carrier, but I don't think it would have come with a 2.7 gear.
Alright thanks. Would it be hard to find someone who'd buy it for that or atleast 750?