I would like to purchase a navy Tribeca tote from Ebay but am worried about getting a fake. I looked at two different auctions and maybe I'm crazy but each one (different sellers) had the same number on the leather tag inside. Do all the Tribeca totes have the same number? I know the item number is the same but the rest of it too? Sorry if this is a stupid question. I've never purchased a Coach bag from Ebay before and am a chicken! Thanks so much.