WASHINGTON (Reuters) - The U.S. Federal Trade Commission and the State of Colorado have filed a complaint against Greystar, a multi-family rental property manager, alleging that it deceived consumers about rental costs with hidden fees, the FTC said on Thursday."The FTC is suing Greystar for deceptively advertising low monthly rents only to later saddle tenants with hundreds of dollars of hidden junk fees," FTC Chair Lina M. Khan said in the statement.