On second though, this suit by the same seller really makes me think something is fishy, as the sleeve tag is black rather than white. In regards to my previous post, Armani Collezioni suits should have a white hang tag resembling this: So I would procede with caution.
That suit doesn't look very good form the photo. Black pinstripes are okay for business, but probably not the most conservative OR stylish option. IMO, black pinstripe suits with that cut are very common among not-well-dressed guys.