You can find stuff like that anywhere....if you want to take the time and find someone who bought it and cant use it, or whatever the reason may be.
Not only that, but Drag is strict about their pricing...so Im sure these guys selling the kits for $2500 are breaking the rules (not that its any sweat off your back). On top of that, if these $2500 dudes give good service, then you've struck gold.