One cool gun I wish I had is a Ithaca M49 single shot. It looks like a lever gun, but operates like a Martini-Henry. I have never seen one up close, so I cannot speak to the quality.
I think I fished one of those out of a dryer vent. I purchased an older house and in the process of getting moved in I noticed that the dryer vent was blocked. I bent a piece of wire to fish out whatever was in there. I pulled out a falling block .22 rifle that looked like a lever action.
It was in poor shape. the stock was broken off and it looked like it had spent several decades in a hot damp environment. I called the sheriff's department; but they weren't interested. I honestly don't remember if it was still in that house when I sold it, about 15 years later. Unfortunately the house burnt in the Klamathon fire, in Northern California, this summer.