To me this definately looks like a reseal as the R2 sticker looks dirty and you can see where the bubble has parted from the card at the bottom right.

http://cgi.ebay.co.uk/KENNER-ARTOO-DETOO-R2-D2-STAR-WARS-DROIDS-1985-RARE-/130500415813?pt=LH_DefaultDomain_0&hash=item1e626e5145

But yet he says "Original box all sealed".

Dodgy wording.

Looks like it could be a reseal. I've seen R2's where they have been a smidege "dirty" on the inside and they were authentic, but this one looks kind of like it was played with. And are those 2 spots on him where someone drew with a pen???