After recently speaking with a Louis Vuitton representative in New York City I learned that one of the easiest ways to spot a fake Louis Vuitton is to look at the outer seams of the purse. A real Louis Vuitton purse will not have the LV initials compromised. So if you see a Louis Vuitton purse selling for hundreds of dollars but on the seam you see only half of the LV don't buy it (unless you want to buy a fake.) Ask sellers to send you digital pictures of the sides of the actual purse so that you can see the seams for yourself.

Good Luck!