http://www.ehow.com/how_5224289_buy-cheap-cruise-reverse-auction.html
http://www.managingchange.com/dynamic/auctions.htm
http://www.artoftravel.com/04cheapflights.htm
http://www.articledashboard.com/Article/Reverse-Auctions---Tips-for-Successful-Bidding/954338
http://biddingfortravel.yuku.com/
http://www.betterbidding.com/index.php?showtopic=23792&
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