It seems it should go around 600K, from the condition you are telling.
Those cracks are mostly related to direct and constant exposure to sun and trapped heat. LIANA dashboard cloth has this issue to crack. I have seen many LIANAs like that, even my own has got multiple cracks. And yes it looks pretty bad!
I have recently come to know that some dashboard repair experts at Plaza can mend these cracks, filling in and correcting the upper cloth/covering. Approx cost is around 10K depending upon the condition, and I have been told that they do it very finely and one cant find out that the upper covering of the dashboard is repaired.
I have no issue right now driving with those cracks thats why not opting now to experience them. But if I would be selling my car, then I might go to them to fix it up first as I think that will effect the resale value due to no-good look of the dashboard.