I have dealt with Steve Barnett for a number of years and I consigned a whole collection of D grades to him, and he did a great job plus I have bought and traded numerous guns with him. So he would get my vote.

I would speak with Jay Schachter of Vintage Firearms.

I bought a double from Kirby Hoyt of Vintage Doubles and was very pleased. My cousin has dealt with Kirby numerous times and is also very pleased.

Selling that BHE
 

I would start here, you have a captive audience.