I agree with what has been said, however because you replaced all of that you could charge more then another well used example. However in any sale I'm willing to pay more when the seller gives full disclosure.
The minute a weapon new is sold it becomes a used gun. It's kind of like a car in that regard.
I had a Glock 23 in the shop that an INGO member came in and purchased. I know the guy that had owned it before. The weapon was never fired, he had recieved it as pay for some work he did at another local gun shop. I sold the weapon for $419 or thereabouts. Even though the weapon had not been fired I priced it as a used weapon because it had been owned by someone previously. Otherwise it would get confusing and I would have felt "weird" putting a $500 plus price on it. The INGO member was happy and I am always happy seeing a weapon find a happy home.
I dont think the OP ever said consider it new resale value or trade in value.
in fact he specifies the he means "new in terms of reliablility/performance" not even a mention as to regaining NEW price.
No where in the OP is he talking about trying to get top dollar out of the gun again, just asking at what point is the "rebuild" considered to be back to new condition.
again, the question is not pertaining to any sort of resale value.
So your happy driving a "new"car off the lot with 45 miles on it, but the gun Joe Blow is selling is used because someone touched it? Yeah that makes all sorts of sense.
PS. Buying a new car off the lot is one of the worst things you can do in my opinion. You lose about a 1/3rd of what you just paid as soon as it leaves the lot.
So your happy driving a "new"car off the lot with 45 miles on it, but the gun Joe Blow is selling is used because someone touched it? Yeah that makes all sorts of sense.