I have a mint condition Nagler zoom that just doesn't see any use these days. In fact it really hasn't seen much use at all.
I use alt-az mounts and find the 50° AFOV doesn't allow much time between nudges. Plus in the last year I've discovered the joys of 82° eyepieces!
I'm sure I don't need to tell anyone how good this eyepiece is. It's sharp, sharp, sharp! Vic Maris of Stellarvue uses it when he star tests all their scopes.