For me anyone that starts using years in reference to avast versions is suspect as avast don't use years.
As far as I'm aware avast don't do boxed versions, this just looks like a CD cover. I would also be concerned by the Malaysia location and a lack of feedback on the seller.
Looking deeper at his feedback score it comes mainly for one person and there are other duplicates in the feedback text and people, it looks like they are trying to build up a positive feedback reputation.
Look even deeper and see the date/time the feedback was left and they look auto generated with as little as a second between them.
This would make me very suspicious indeed and even if what he is selling were legit, I wouldn't touch it with a long stick, in fact I would be considering reporting him based on the product being possibly a pirate copy and given what looks like a fabricated feedback score.
