Was at Costco over the weekend. XBOX One's aplenty. $475. They had a pallet of them and it was not missing one box. No PS4's though. I thought I would post that they were selling them for $475. $24 off amazon.
I like Costco. They have a very generous return policy and "vet" the products they sell. They extend the warranty's of most electronics by a year or more but I do not know what they are offering for X1. Best to ask them.