That Is....
An RR-4D, Amana's first model with Automatic Defrost. Looks like a very clean and well-cared-for unit. For a wonder, the owner is not asking for a solid gold locomotive in exchange for it.
If there are no issues revealed in an in-person inspection, the price is extremely good. The major issue I would look out for is holes or separations in the white plastic of the door's interior portion. Aside from that, if it turns on and heats water, it's likely pretty okay.