OPA Online Auction The OPA auction is a premier online event, limited to Master Signature and Signature Members only at this time, allowing them to auction their artwork. Questions? Contact Us Thank you to all the entries received for the OPA Online Auction, which is now closed and no longer accepting entries. We will be preparing the entries for the official Online Auction which, though scheduled to begin November 1, has been postponed. Details to follow this coming week. Thank you for your support and patience! Complete the form below to add your artwork to this upcoming event.