Need information on Yanmar YM1810D tractor

This is my first visit here. I am considering purchasing a used Yanmar YM1810D, 4WD, 3 cycle diesel, 21.5 HP. I will be using it for weed/brush control, disking and lightweight hauling. Does anyone have any experience with this model and also do you know what year they were buiilt?
Thank you in advance for any input.