Yeah, definately sounds like Allied wants to rip you another butthole! Those bastards
I got my Skunk2 camber kit from Automotive Engineering for under $200 and I went to Fred Cox Automotive and Alignment for the adjustments. I was charged some where around $115 for front and rear alignment plus the camber adjustment. If you add those prices up I do believe it's around 1/3 of what you were quoted.
So I wouldn't recommend Allied unless you have money to throw away, in which case...I'll take it off your hands
But in my expierences with Allied I only go to them for a quick wheel balance because I know someone who works there. Other than that, how about a big NOoooo.
Hope this info was useful