Photo store: There isn't one
There isn't a photo magazine in Kazbegi, so if your memory card is full and you are looking for a place to burn a CD with some photographs - forget about it, we didn't find a shop there. Although, some people recommended checking up in the hotel, they might have a computer there, but then you will need a cable, which we didn't have anyway.
None: Camera battaries
There isn't one there!
What to buy: If you are trying to buy some alkaline batteries for you camera - forget about it! Make sure to bring some with you, because there is no alkaline batteries available in Kazbegi!!!