My name is Lucan Valerius. I run the Riverwood Trader just south of Whiterun. I carry just about everything you could need for your travels across Skyrim. Stop by and pay my sister Camilla and I a visit sometime!
I wasn't implying that they were botting, it was just a suspicion. (it wasn't misplaced, either, that was my fault, I didn't see the question)
And vendors do type in their password. So do buyers. It's required, and even if they have it saved, it almost always takes more than a second to get it set up.
And, if you look at the reply, they were being sold for an absurdly low price, (50k for 1g), so I presume that they re hacked.