if you buy them from the guy I traded email with it was thirty bucks but that is only to the point of the ship in china... My guess is there are import fees and stuff plus shipping cost to you. I never could get him to answer that question for me.
One of the ebay vendors will sell the kits for 150 shipped. This isn't bad considering it costs several thousand dollars to ship a container from China to US. Don't forget import fees, paperwork, and transit costs from shipping yard to vendor. It all adds up. I thought about importing the engines and figure that my unit cost would be about 90 dollars/engine for the smallest order possible.
So if he will sell 10 - 50 kits at $130.00 delivered this is a good price. So far I am happy with the stuff I get and quick service & communications from BoyGoFast out of El Monte California via eBay. I am waiting on a 50 Slant Head for about $145.00. There are lots of options out there.
blue collar bike has a deal for 5 kits @ $170.00 each that price includes shipping as long as you buy 5 or more. or $199.00 per kit for 1 & that includes shipping too. the limited kits are 10.00 more. his kits are good quality, & i know, as i have bought 2 so far. hope this helps. p.s. bob is a great guy, & he ships the same day if you order early enough. none of this 2 to 4 week crap.