Me either, but they don't seem to. I have a buddy that had one in a blued barrel and a black stock and he was trying to sell it to me for $50 last year. It finally sold right before muzzle loading season. His wasn't in perfect shape, but it wasn't bad either. Looked about like the one picture above condition wise. His shot really well, and I'd have bought it if it wasn't for the fact that I wanted one with the SS barrel and that used 209 primers instead of musket caps.

I see muzzle loaders in the local classifieds here all the time from $75-200 and lots of them are in good shape, and most of them have a scope on them. I'm just not sure why they don't hold their values.