Canon Speedlite 430ex Ii Prices

Flash Canon Rebel XSi question.?

I'm looking to buy the Canon Speedlite 430EX II Flash for this site and http://www.newegg.com/Product/Product.aspx?Item=N82E16830994286 I have some questions. 1. Is this a wireless flash with my Canon XSI? or I have to buy a transmitter or something? 2. Is this a fair price? There is a thank you wireless way to economic im 17 and an aspiring photographer, but do not know much about flashes for

If you want to know more about off camera flash, http://www.strobist.com see no cheap way out of the camera and cause a flash dedicated remain. It is not very expensive means of travel outside the room if you are willing to set the flash output manually instead of using ETTL (the 430EX has the ability to control power Release is manual, not all are flashing). As Strobist