This gun does have the flip up sight and seems to be in good shape (no cracks in the stock, etc.) I have operated the lever to cock the rifle firing mechanism but I can't get the rear trigger (or front) to work the rifle firing mechanism. My guess is that the hammer spring is broken and maybe even the firing pin spring. I will have to open it up to look at is closer.
Thanks for the help. I am still wondering what I should offer for the gun. Any thoughts?