Dry cargo vessel operator Navios Maritime Partners L.P. agreed to buy two vessels -- a panamax and a capesize vessel -- from Navios Maritime Holdings Inc for about $130 million, Reuters reports.The two vessels -- Navios Orbiter and Navios Luz -- are currently under charter contracts, and the company expects the vessels to generate an aggregate base EBITDA of $122.3 million over the term of the contracts.