By Jim Misunasjmisunas@gbtribune.comLARNED — Negotiations to sell the city-owned National Guard Armory are continuing between Larned city manager Lane Massey and co-owners of an agricultural firm.Massey and the Larned city council continued their discussion of a pending contract Monday between the city and Heartland Irrigation. Heartland Industries, a drip irrigation company based in Moundridge, has an offer to lease-purchase the armory, which had been listed for sale by the council with an asking price of $250,000.Co-owners Mark Vogts and Brian Wedel, partners in the company, have appeared with Jan Windsheffel, the Salina district sales manager for the Netafim irrigation company and Heartland’s chief supplier, based in Fresno, Calif.Massey said one item under discussion is the term for “first right of refusal,” if the new owner wants to sell the property within a certain time frame. Massey said the city would like the first right of refusal included in the contract. ‘The Armory is a good asset to the community and if we wanted to repurchase it, we would want to protect the interest of the city,” Massey said.