Over here in the U.K, you can get 'reciever cylinders' from the usual suppliers, which are guaranteed to be spotless inside. They cost somewhat more than recalaim cylinders, but at least you know they're as safe as possible.
I have known stuff to come from the factory with moisture, low charge, wrong blend, and even entirely the wrong refrigerant before. Nobody's perfect, I guess.
My personal choice would be to always use fresh refrigerant whenever possible.