The DB-ALL(Cheap kit) no longer supports via firmware upgrade the 3x lock start function. It is now to be used only with a separate auto start unit. Or, you could get the 3x/5x unit which is more expensive but does support the 3x lock start function. The guy on ebay your speaking of had a few that he had flashed prior to the Oct 1st firmware cutoff date.
Doing auto electronics for years, I have never been a fan of DEI(makers of expresskit, viper, etc). This current move just reinforces my opinions of the company. With that said, the Flashlogic Databus adapters are most awesome. They have a similar T Harness options, are cheap, offer better options and still do the 3x lock start function if you don't want to do a separate alarm/Start unit. Also, they have a cool smartphone app that allows you to program the unit to your car, and it gives wiring diagrams to you vehicle right on the screen.