When I was 18 years old, I bought a baby Louis Vuitton handbag off of eBay. It was about $400 and light blue. I loved it. Then the zipper broke, and when I took it to the Louis Vuitton store to get repaired, the snooty sales girl informed me that it was counterfeit. Eighteen-year-old me was incensed, humiliated and embarrassed, but I learned an expensive (if important) lesson: Don't buy designer goods off of eBay.