In the current market I'd say $350 would be about average to high, though I tend to devalue SKS-Ds a little more than the next guy because I'm not desperate for the AK mag "feature". From the pic above a few things are evident.
The muzzle brake is ostensibly not original and devalues the gun from a collector's standpoint.
The lack of a bayonet doesn't necessarily indicate a chop job but again, a collector would prefer a model that includes it. Most SKS-D models seem to lack this feature.
The barrel is an anomaly. A quick Google image search for Norinco MC5D reveals that most examples had short 16.5" barrels (otherwise known as the "Paratrooper" model in the States) or full length SKS barrels. Comparing the two, your barrel is noticeably longer than the 16.5" even without the brake. When compared with a normal SKS it seems to be shorter. Some examples for comparison, note the barrel length past the gas block compared with the length of the exposed gas tube:
The mag catch is the less desirable pull-style that mimics the original SKS release rather than the AK push-style.
When you factor in the availability of Tapco 20-round magazines and their comparatively low price and higher availability versus AK mags in Canada, as well as the price of new refurb SKSs reaching as low as $150 or even $125 for a lightly used Chinese model on the EE, the SKS-D begins to lose appeal fast for all but the heartiest of collectors. I would put a value on this particular example of $250-300 but given it's modifications I wouldn't be interested in it for quite that much. Nevertheless there is always someone looking for one of these so start at the suggested $350 if you're looking to sell, and you can always work your way down or take offers.
