The $135k is just the hardware price for the base configuration. I'm sure you're required to license several software SKUs that are not cheap and that you have to pay annually for maintenance.
"5 This price reflects the base hardware configuration, and does not include additional items, maintenance, the operating system or other software. All prices are in USD. Prices shown do not include tax. Price will vary based on country and currency."
I don't think that's true for LinuxONE. One of the points is that it behaves as a large and fast (with lots of dedicated acceleration hardware) Linux machine.