I'm going to guesstimate that virtually any servicable diesel tractor/loader with less than 300 hours on it is going to be worth at least $5000. The LB1914 has a small but loyal following and parts are readily available or at least we don't hear complaints that they are hard to get. However, the market determines price so I agree with the idea that you could look at recently completed ebay sales to get a realistic price range.