Was in a Gander Mtn store, just north of Houston, a few days ago and they had three trap door rifles like yours. As to their condition compared to yours, externally, probably better, but they wee behind the counter and did not examine them. Mind you, to me, Ganders prices always seemed on the high side for any firearms they sell. So, fWIW, each of their trap doors was priced over $1250.
Know gent in his mid 70s, who has a long rifle trap door displayed on his den's wall and its a darn nice one. He was a machinist by trade, but has done gun smithing on the side for well over 40 years. Pretty talented too, at making rifle stocks from a piece of wood. Anyway, took a rifle to him one day for a new barrel to be put on and was again admiring the trap door rifle. Never did ask him what it was worth..... but, he'd already told me it was his pride and joy, so to speak, and that he'd never sell it.