the websites usually claim to sell authentic goods which are sold at a very low price, giving reason that they buy the branded goods at a bundle (straight from Italy), and also they do not need too much administrative work like those in a store (also no need to pay for the rent to have a store), thus have a good deal.
such branded goods with low prices, are they real and authentic? how to tell?
Answer on Is it safe/ authentic to buy branded goods online? (on unofficial websites that claim to have authentic goods)
They can be authentic and duplicates as well you cannot tell once you try them. I make most of my purchases online and some turn to be fakes, I do not deal with them later.
Online purchases can be a bargain, I recently bought a branded product for 15% less than on the official website that I used to buy for years and this was authentic and original as I have been using the product for years.
So what is the Italian product you are trying to buy?