Hi Mike, it is hard to know what to advise you. It seems from your reply that you are attracted to this gun and half inclined to buy it, but the price is putting you off.
What specifically appeals to you? Be honest!
The dealer must have reasons for that price, including the value of the zōgan inlay along the top of the barrel and the talismanic Buddhist 六手 characters. If it is a 士筒 Shizutsu (larger samurai gun) this will also add value, as too the possible the Ogino School of gunnery aspect. Was the butt rather long and shaped a little like an elephant’s trunk?
To offset that, the gun needs a new foresight, and how much would that cost you?
In the Schrödinger‘s Cat category is the state of a) the pan, b) the Bisen breech screw, c) the inside of the barrel and d) the shape of the butt. These would be more important to me as a gunner than any fancy inlay, but from those shots I cannot judge. You on the other hand, may be happy with the appearance of this particular gun and not so much with the others he had for sale…(?)(We can see an Osaka gun in the background of one of those shots.)
Speaking as a neutral observer, I like what I can see so far, but the price would not suit my wallet. But I am not abreast with antique gun prices in the continental USA.