Do they really work? Which one is the best and why?

Take a look at this... http://www.electroniccigarettereviewsite.net/

They are pricing these products extremely high. Are they really that expensive?

There is a vendor at the Golden Goose Flea Market selling a brand (don't know the name) and the pack with USB charger and two end thingy for only $10. Refill packs of 4 are $5 each, I think, maybe less. There are two ladies from the Swap Meet side currently using them and they said that it works.

I'm wanting to get one and see if that will help me stop buying cartons of cigz. I never see them anywhere around....other than on television, online, and in that vendor's mega-huge booth.