an interesting discussion ..... ok ..... Jnat Coticule or a very good, possibly old Coticule stamped "Best Quality" certainly costs $ 500 (But he does not get)
So with a 8000 grit cotucule costs as $ 200. But then I just 8000grit. So I still need one or two stones Naniwa ... or Escher ..... this may cost $ 400 ......... I Nakayama Maruka one for $ 500 and have 3 small stones. that's all well and does not cost more. It does not matter.