That's a pretty huge discount, so I'm getting ready to pull the trigger. Obviously Walmart charges sales tax in some states (including mine CT).
This printer is also eligible for $100 rebate when you trade-in an old printer with HP:
(if you buy toner too, you also get rebates on the toner carts)
Note that this printer has an ethernet network connection but DOES NOT have wifi / wireless. The model M477fdw that has wireless is still the same price as always. So be aware that you need to have an ethernet connection for this printer. If you're plugging it into your wireless router via ethernet, it will then be wirelessly accessible. (If you don't want it to be physically near your wireless router, you can use a wifi-to-ethernet adapter, which can be had for less than $50)