The Las Vegas-based casino operator announced Thursday that it completed the sale of land and other real estate assets of Encore Boston Harbor for $1.7 billion in cash to San Diego-based Realty Income Corp. has closed the sale-leaseback of its hotel-casino near Boston, giving the company a mountain of cash and hefty rent payments. Cannon/Las Vegas Review-Journal) Resorts Ltd. Some of the first guests gamble on the casino floor during the opening of the $2.6 billion Encore Boston Harbor in Everett, Mass.