At gun shows I've seen the odd SKS-D with a shot out barrel (pretty much smooth bore) on a table for $500-$600... they usually only make it through the first few hours of the show before selling.
Both the "D" and "Paratrooper" versions were made for the US market, and then when Clinton banned the Chinese imports, the leftovers got dumped in Canada, IIRC. Between the two, I'd rather have a D, for the better mags, but it would need a decent barrel, and not shot to sh!t like the ones I've seen at shows. And probably not for $500-$600 either, I've got to much Scottish in my blood for those prices.