The SKS-D will be worth whatever you and the buyer agree on, they sold for $159 back in the 90's so he's gonna bend you over and make you uncomfortable on the price. The short mags suck balls for inserting, longer mags are ok. Its still an SKS and just cant compete with the 858 in terms of weight, balance, ergonomics, magazine fit/ease of mag changes, sights, aftermarket parts etc. If you really want one then its worth whatever you gotta pay to get one which can be $350 or could be $700 with no regard to condition or included accessories. If cost is a concern I'd go with a type 45/56 SKS, if fun, look-cool-factor and a better handling/more accurate rifle are more your thing then go with the 858.