I like them so much I own five. One is chambered in .45-70; my most recent purchase. I reload, and have fired up to 'Ruger No. 1' loads in it. Your shoulder will determine what you shoot.
Handi's are very accurate. Also very simple. Some tend to string shots vertically, some FTF due to light hammer strikes, actions open upon firing (happened in my .500 Mag), but this is often fixed by simply cleaning the barrel lock bar. The trigger pull is heavy from the factory, but dad probably had that fixed when he sent it back to have new barrels fitted. All that being said, the above problems are still very rare and usually simple, home fixes.
As far as price, my purchase instinct is usually triggered around $180- new or used. But I'm cheap. The Graybeard site is a wealth of knowledge; people doing lots of unique stuff over there. I would venture to say your father was a man who valued function over form. Handi's aint pretty, but boy do they work! If you choose to sell it, it may be worth more parted out over at Greybeard.