Paul,
H&A underhammers are notoriously ugly is a true statement, but they do shoot well and are easy subjects to remodel. They are inexpensive, foregiving and like a puppy, they just keep on giving. You find them available periodically and they often command what seems to be higher than average dollars. I have built offhand target rifles, chunk guns and even trap guns out of them. Give it a try, you might like it.
Mark