@Pika Id have to log into the new region from he start, go find the same product, then order. I dont think it would work if I change region half way through a purchase.
@Pika@supercheesecake dont wanna butt in but in case this is relevant: I use at least 3 Amazon regional accounts here in Europe: UK, Germany and Italy (I live in another EU country). I sign in with the same username/password. Currency of products changes for UK from EUR to GBP, and often different ranges of products can show up. I have multiple addresses listed for delivery and just select the one I want.