They were the last of the calibers brought out in the series of the "Acusport". 45, 44, 41, 45/45acp then the 357.
I had rounded up 41, 44 &45C thinking I wanted the "set" but when I finally acquired the 357 I was surprised how heavy it was, never shot it and a few years later sold it.
Then the 44's became an hard to find, low # production, item, the prices went crazy and I sold it.
The 41 has been one of my favorite handguns, power to weight ratio, keeper.
I've seen the 44 bring 9-1100.
The 357 will bring a premium, usually in the 750 range. Same w/ the .41.
The 45, 550, the 45/45acp 675.