If you have providance "proof " detailing what type of work done. Either a certificate, a bill in writing detailing the work done and cost, or special stamping on the rifle will greatly help establish price. Especially from an ACGG member who is validated to produce a superior product. It is money in the bank. If you don't have it, try to get it.
If no providance exists the only way you can get top dollar is if the experienced buyer gets to physically examine the rifle and recognizes the sweat equity that has gone into the work, he'll want it for what it is, price be damned.
Inexperience will get you run of the mill prices.
Good photos especially detailing the uniqueness of the work. Remove the scope and sell seperately.
Best of luck to you, try to post some photos.