I have a chance to get a #3 Hep in the .40-50 caliber for 3K. It's mint with two stocks. One a shotgun and the other with a Swedish buttplate. I really don't have a use for this caliber but it's sure pulling on my arm for a schuetzen rifle.
I have a #3 in the .38-50 and MVA does have the proper base for a tang sight.