As tractors get older the fair price range gets wider, depending on condition and what kind of life it has had. I would guess a L245DT would be worth that if it is decent - good rubber, good sheet metal, no leaks, no obvious major weld repairs, soft parts in good shape. 1700 hours can really show unless the owner has maintained it well. The early Kubota models are high quality tractors and with proper care they can last forever. Any chance of posting a picture?