Heritage Auctions closed 2012 with more than $20 million in sales. Overall, the Dallas-based collectible auctioneer says it experienced its fourth straight year of record sales in 2012: more than $860 million, the highest tally yet for the world’s third largest auction house and largest auctioneer of high-end collectibles. Markets ranging from U.S. Coins, Comics and Comic Art and Historical Americana showed strong gains as did sales of Western Art, which the company says more than tripled over last year.