Paper Tree Buy books and paper from a selection of fine products from Paper Tree. Silent Auction Bid on special one-of-a-kind items at our Silent Auction. Remote Bidding Place a remote bid on special one-of-a-kind items at our Silent Auction. Vendors Vendors of origami-related merchandise can sell their wares; register here. Preorders You can post items for people to preorder for pickup at PCOC. Consignments You can consign items to be sold at PCOC.