Gas Heater - $600 (NE Tucson)

This heater is nearly new, It was used for 1 week then removed and put in storage.
Was bought for a 2000 sq ft house with swamp cooling and changed out for a 5ton gas pack ac unit.
Bought new at supply house, cost with no mark up for $900.
00.
Willing to sell $600.
00.
Thank you for looking, Tony