Whether you are an Auctioneer, Staff Member or a Vendor… The best place to be mid-January each year is at the PAA Conference & Trade Show! Vendor Information Annually, The PAA hosts a Trade Show in conjunction with our Conference in Harrisburg PA. We hold one of the largest, if not the largest, state Trade Show in the U.S. Plan on joining in on the fun, gather some new clients and catch up with existing clients.