how to spot fake aftershaves and perfumes

i recently bought a bottle of hugo boss selection off seller 777punto777, the box was sealed , but once i opened the box the lid was loose and the writing on front of the bottle scraped away easily, this is a sure sign of a fake fragrance, the seller has made his feedback private as he knows people are finding him out and leaving him negative comments, my money was refunded and a complaint made to ebay, be careful when purchasing fragrances, they are making good copies out there, and i would warn you not to trade with seller777 punto777.