My advice would be to look at Glassdoor. Then bring down you offer as much as 22-25%. It should make you most compettivie on salary basis should your education+exp+looks don't compete equally with a 25yo 5'10", blue-eyed, blonde, 34-26-32 bombshell.
This is a different poster. Please say that isn't true. The glassdoor numbers look fine, but I've got a mortgage and a family, 20% being chopped off would kill us. It would be less than I'm making now.