If you want to get one according to the Tormach website there is only 1 left.
That could be the last one made & going forward it might only be the M series???
I can hardly believe I've had mine for 6 years.
The question now is would you buy an M series?
I'm not in the market but I would want linear rails, servos, BT30, an 8K to 10K spindle and at least 3HP.
The MX gets close but for the money I would be looking at the whole field of offerings.
There are more now than there were 6 years ago!