I have a 44 Mag. That I will be getting rid of here very shortly. It is a shooter grade, drilled and tapped reciever with a Redfield rear sight.
As for #3 45-70 Liberty, I'd say around $600-650
Just looked at a 200th Yr #1 in .45-70 last night. Took home an OM flattop but put the #3 on lay-a-way. Just gotta find the correct butt plate for it now.
In Boise this past weekend, I picked up a perfect condition #3 in 44 Mag. It was on my short list of next purchases, so I was tickled to get it. I will post pics soon.