Generally around $80 if it's just a toe-in adjustment & caster/camber check, sometimes there's a special around $60.
The cheaper the price, the more the shop has to hope for upselling to the general public.
On my Mopars or the Mustang with caster/camber plates, it's at least $80-$100; partially because I want certain specs.
I make sure I get along with the guy, and it's always their best guy, as I explain what I'm after going in.
The way I look at it, I want it right, and I expect to pay more than the basic quickie by an average tech & factory settings.