At the shop where I buy most all my guns, the Kel-Tec goes new for around $250 and The Sigma for around $300. I think $350 to $400 for both would be about right. Just depends on how bad he wants to get rid of them. I have both and I think the Sigmas get some bad press they don't deserve. The early models had some frame cracking problems. If you look at some of the S&W forums the VE Series seems to have the problem solved.