Prices are from around 3.20 euros to 3.80 euros per pack this is as far as im aware the current price range. It does depend what you buy.
Dont go over expecting to buy, superkings, regal, lambert and butler, b&h etc anywhere apart from the airport (unless you get really lucky)
Most gaspers over there are spanish, american etc, so you will be able to buy marlboro, philip morris and fortuna, diane etc.
I really dont mind the fags in italy and enjoy smoking something different anyway and they taste fine