Just an observation worth keeping in mind: The Japanese M10 has button labels printed in Japanese characters. That may not matter to you, but will affect the resale value outside JP.
I don't know what you mean by decent price, but I rarely see them offered for less than 18,000 JPY and that is for very used copies, and in the range 50,000-90,000 for NOS.
At either price point, there are current offerings I find more attractive - although modern alternatives does not share the tactile solid feel of the M10 (the LS10 is equally solid).