Fifth edition Blue Book of Modern Black Powder Arms (2007) lists value of 2nd Gen 1st Model Dragoon:
100% (NIB) - $650
98% - $450
90% - $300
80% - $225
They usually fall in this range on GunBroker, sometimes bringing more for a truly pristine unturned model still wrapped in plastic with a perfect box.
Fingers (Show Me MO smoke) McGee