The incidence of counterfeit games is pretty high as well for anything not listed as sold explicitly by Amazon. Christian Petersen, head of Asmodee NA, recently had an interview where he talked about how bad it has gotten.
If you're buying online, there are a number of great shops with great prices.
Cool Stuff Inc.
Miniature Market
Fun Again Games
Cardhaus
I've had the best experiences with CSI and MM, I order almost exclusively from CSI. Dont ask me about what level I am on their customer loyalty program
Unfortunately they are all sold out of their Gloomhaven pre-orders. I even checked 401 Games and Quiche Games in Canada because I had luck with them on other games when American retailers were sold out. No dice.