I buy some things from Hobby King, but I strongly recommend that you don't buy ignitions from them. They have had lots of problems with their cheap ignitions, and returns for refunds or exchanges are problematic as well.
Here are some places that I recommend to get them from:
www.rcextremepower.net
or
http://www.agaperacingandhobby.com/v....php?groupid=5
or
www.ch-ignitions.com
AV8TOR