There is a new-ish one that is gaining in popularity too called the gastric sleeve.
http://www.obesityteam.com/weight-lo...ns_Sleeve.html
There are a few people here that have had that proceedure and like it.
I had the RNY gastric bypass...love it!
http://drsimpson.net/07_surgery_stor...02/RNY/RNY.htm
As for cost...they vary. Open surgeries are more expencive then Lap. Here in ID, it ranges from 24,000 to 35,000 (again the higher numbers for the open procedures). I found one doctor here that did the Lap version for 12,000, if you are self pay.
Good luck to you,
Angela