The problem with a place like gunbroker is - you need to have a very good idea of the value of the gun before you place the add. I found one past auction on gunbroker for a 1795 in not as nice condition for $1800 reserve not met. With a high-grade weapon like that where you're asking for a big surcharge for condition, buyers might want to see the thing in person before putting down several thousand dollar.
I would look for a reputable gun auction specializing in antique weapons, that's where you find the collectors with the deep pockets to really get exited about a piece like that. Just compare these two auctions, and you see how much close inspection can influence the price