I have a new in the plastic  (with trunion, rivets, all the parts) that was bought from KVAR years ago.  I finished my build and ended up with two of these.  I have looked around and seen a great disparity in prices.  What is a realistic asking price for this?

Because it's a virgin, and therefore cost for building is a tad higher, I'm gonna say a good price point will be between $1000-$1200 in today's market. If you start an auction, this is where I would put my reserve at and start it at $600 or so and see where it went from there. Since you bought it years ago, your initial investment is probably around $300 anyway, so even if you only get 1 bid at $600 you have already doubled you $. However, everyone wants to maximize their return. Good luck!

Perhaps I was not specific enough.  This is the side folding stock and hardware only.  Not an entire kit.

oh, $300 +/-