I don't know the new or used pricing on that tractor, but, unless it was somehow stangely abused, 150 hours is negligible time on a diesel tractor--ie, almost new.
Kubota /L2650/ LA450/B4690 -- John Deere 450 Dozer
Quizme, you can go to www.tractortips.com and get the new price on the tractor and take that as a place to start.. I have a L2650DT or 4wd.. It had only 167 hours when I got it two years ago. I do not think you will fine many L2650 on the board... Apparently they sold a lot of the L2650's here locally... It is a very tough tractor, and will do a lot of work... As hard as I work mine, I do not think I would like the 2wd. It is a big difference in this size of tractor...