(Adds that Barclays declined to comment)By Greg Roumeliotis and Soyoung KimNEW YORK, Sept 16 (Reuters) - Eagle Merchant Partners, a private equity firm, is exploring a sale of PODS Enterprises Inc that could value the U.S. moving and storage company at about $1 billion, including debt, according to people familiar with the matter.Atlanta-based Eagle Merchant, whose team came from bankrupt Bahraini