My comment stands with the added photos. The stock has indeed been sanded quite a bit and it's missing two barrel bands. I also can't see any unit markings on the buttplate tang, most Canadian Sniders will have unit markings (my profile picture for reference). I still think 600 is the highest realistic price you'll get for it, they're not uncommon rifles. For reference, the last Switzer auction had 2 x Snider 3-banders go for slightly under 600, that's with buyer's premium, both in better condition than this one, complete and unit marked.