It's hard to see any difference from new.
As far as I'm concerned, they're brand new, especially if the batteries are anything to go by!

No, New. Rebuy also offers interesting deals on second-hand items.

Excellent 👌

Items marked "used+tested" are cleaned and tested, but not strictly speaking "serviced". They have no defects/problems that require revision. The visual condition is checked and the functionality is verified.