Buy them if you want to. If you think it's bogus when you finally get to see them, talk to the seller. He has a lot of good feedback, and rest assured, they are plain scared to get a negative in there, so he'll definitely help you out if you have a problem. You can also return it. Remember, if you recieve them, and they aren't REAL craftsman sockets, you can file a complaint. His listing says that they're craftsman brand all over it, so you're good to go. No "shady" wording there.
They are unused. Brand-new. Quality is good. They're probably not the ones with the lazered-on sizes, but buy a socket organizer and you won't have any issues with that anyways. Made in the USA alright, and if they aren't, get your money back.