I am also thinking of purchasing the SE530's from eBay. When I looked at Shure's website, it seems to me that they do honor their warranty, regardless of the reseller...could someone please comment or correct me??
"The warranty is Shure's guarantee that the product will meet our standards of quality and performance. The warranty applies to items that are purchased new in factory-sealed packaging regardless of the seller. Shure strives to form relationships with resellers who will provide the best service and value to customers who buy our products. Authorized Dealers receive only inventory that is new, in factory-sealed packaging, with all accessories, documentation, and full factory warranty. Authorized Dealers receive extensive factory support, and they are the first to receive shipments when new products are introduced. Non-authorized resellers do not have any direct business relationship with Shure. Shure cannot guarantee the authenticity or condition of the items they stock, and we have no ability to intervene on the customer's behalf if necessary."