They said theyre going to offer a discount on the 821s but I dont know how much of one. I do know it comes with a 3 month wait however.
I'd get a refund and move on. I think there's a ton of hash power that's going to come online in the next three months, and you'll be underwater on the device. You have to add some contingency time to that 3 months, so it's more like 4 months for budgetary purposes.