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ATLANTA — AutoTrader Classics is using Facebook as the catalyst for a contest in which the grand prize is an all-expenses-paid trip for two to the Barrett-Jackson Las Vegas auction in September.

Participants can register for what AutoTrader Classics has dubbed "Cars & Vegas" beginning today until Aug. 9 at www.facebook.com/AutoTraderClassics. Officials highlighted the grand prize includes two round-trip airfare tickets, two-night stay at the Mandalay Bay Hotel and Casino on the Strip, two tickets to the Barrett-Jackson Collector Car Auction and $500 cash for expenses.

AutoTrader Classics indicated the winner will be selected at random and notified shortly after the contest concludes. Full official contest rules are available at the contest Web page.

Officials recalled last year's Las Vegas event at the Mandalay Bay Resort and Casino. They pointed out Barrett-Jackson hosted more than 51,000 attendees and sold more than 400 units for a total of $29 million.

In addition, the event is set to feature 100 vendors and sponsors displaying a variety of items including aircraft, custom cars, racing gear, collectibles, jewelry and clothing.

"Barrett-Jackson runs some of the most exciting auctions in the U.S. and with Las Vegas as the backdrop for the September auction, this is a prize any car collector or auto enthusiast would love," explained Rob Huting, general manager of AutoTrader Classics.