So here's a gotcha. I apparently created an Amazon seller account a long time ago, and completely forgot about it. Now if I try to log in with my usual email address - the one with which I order items from Amazon - I cannot log in. I contacted Amazon, and they said that my seller account hadn't been used for so long that they closed it, and they cannot reactivate it with the same email address. That's a pain in the butt - I don't need another email address to check, especially if I'm travelling (which I do with some frequency).
I don't know how long they would let a seller account lie fallow before closing it, I didn't ask.
FWIW,
Elysian