As Vantage says.. stick with a company that has been around for a while. JetCat for example. Kingtech is about 5 years old now but still has earned a good name.
This is just an example of a VERY sweet deal and is active now! http://www.rcuniverse.com/market/item.cfm?itemId=891397
I have this engine and it runs flawlessly. 22lbs of thrust and very responsive.
Any Jetcat with SE on the end is the new more powerfull and consumes less fuel. Non SE's are old teck, but still have a place in the hobby, plus cost less.
Here's an example of the type of plane that "I" recommend. Others opinions may vary..
As a curticy to the person selling this jet(I dont know him) I wont comment other than to say that the engine is a tad small. Pm me if you would like to discuss it more.