Tractors are usually not referenced by year, so you ought to drop this notion of "2020", especially since that could hurt you. 470 hours is a pretty high amount of usage for a "2020" tractor in that market. In the lifetime of a Kubota, 470 hours is not a big deal at all, they should go at least 5000 hours before work is needed, but when you compare to typical hobby-farmer buyers of a L3560 and what they will put on a tractor, 470 is high for a tractor labeled as a "2020".
The recent model used tractors that sell for a hot price are ones with low hours that are "practically new" in the eyes of a buyer -- they are no-brainer alternatives to buying new and command new prices. At 470 hours, I think you are well past that honeymoon stage.
Have you sat on a 4060 and driven one? It is a much larger tractor with a completely different frame (shared with the larger Grand L models). When I was shopping all these tractors the L4060 was noticeably bigger than the L3560 when side by side and when driving them. Both great tractors but noticeably different in size.