I'm getting rid of my ak-builder.com flat bending jig. I've made 10 receivers with it and I think I'm done with AKs for now. It's the one that you need to hammer the rails. It's in great shape with a lot of life left in it. There are some hammer scratches and minor, minor dings on it.
$75 plus $20 shipping in the lower 48 (it's heavy and I'm sure it'll cost me more)
Thanks for looking!