Help, I just sold a Chanel handbag and the buyer paid immediately. I planned on mailing it this afternoon via USPS Priority Mail and getting it insured. However, USPS only insures up to $500. The bag is worth significantly more than that. What should I do? Is there additional insurance that I can purchase elsewhere? I'm just afraid of something happening to the handbag. I would rather be safe than sorry. Any advice is greatly appreciated.