An SKS Sporter could very well have been an SKS-M or SKS-D... a variant designed to take an AK mag. Not a true military design, but still an SKS none the less. I also told myself for years, I would never own one of those commercial clunkers........ I will admit, the last two I purchased, were in fact SKS Ak mag para-length variants, they were the less common variants, the Type 84 and the SKSNR. If I ran across another commercial short barreled, Ak mag design for a good price, I admit it...I'm there and it would probably come home.
While not military design, they hold their own, even have a collector niche due to their hybrid design, some had a low production number or small production time frame, and value wise, a few get up too and even exceeding the price of some more expensive military models from other nations, especially if you find one unfired in it's original packaging with all the accessories.
Again, like I said, don't judge it till you lay your eyes on it, or at least put your hands on it for a closer inspection, you could end up with a slamming deal even on a purpose made commercial model. I've kicked myself down that road of remorse, saying no, then finding out all the pertinent info that says I just walked away from and let a $1000 rifle slide through my fingers that was being sold for $500.
I'm doing the can kicking down Remorse Avenue right now over a High Power pistol I let go.......