in people normally sell sngs for 375 in the market. the real basic sng retails at $400 at stores and can go anywhere up to 475+ depending on the options and such. smf retails at $475+, and AR/GB retails at $400.
AR/GBs are sooo beefy. not sure about the fixed blades, though. check out mattdtactical, bluelinegear, tadgear for some striders. there are other sites, too, but i can't remember any at the moment. :)