I've seen these stocks for sale on eBay and Amazon thru my research last few days for $20-$60 USD.
Most of the 'murican gun sites where I was able to find any info at all suggested $20 and up at gun shows etc.Also,again,lots of debate/skepticism as to whether the material is actually Bakelite or fibreglass being incorrectly touted as Bakelite?The consensus seems to be that Bakelite was pretty much obsolete and far more expensive to produce then alternative materials by the time the SKS was introduced,with skepticism that it's probably not actually Bakelite?
Honestly, I don't care if it's Bakelite or fibreglass or something else,not worth arguing over IMHO,it's a unique and clean looking SKS and relatively rare as SKS stocks are concerned.
I'd say it's well worth $300 as a very clean and new looking SKS when you consider beat and banged up milsurp refurbs routinely retail for $200-$250+, and if I wanted another SKS I would have snapped it up,as it's the nicest condition SKS I've ever seen personally,mind you I'm not an SKS authority nor collector,and only browsed at it thru display cabinet glass.