Marc Chun (aka Hwan Young Chun) purchased a jersey from another seller on Mercari, then he purchased a jersey from me on eBay. After receiving my jersey, he opened a return request and uploaded pics of the other Mercari jersey, and returned the Mercari jersey to me while keeping my jersey. He has also done this before to other sellers who sell sports cards. On Mercari, his username is ChaseGood and he uses a slightly different address: 16312 Aurora Crest Dr, Whittier, CA 90605