With a round column machine,you can fit a cheap DIY shop laser pointer, to aim at a line on a distant wall to restore alignment.
At about 10 feet (3 metres ) you should be able to get within a thou (0.025 mm )
You need to weigh up the pros and cons.
Buying a new machine; if there bis a problem, you can get back up.
With a second hand machine, it may be larger, more powerful, and come with extra tooling (Which you would need to buy for a new machine ) But if there bis a problem, apart from advice on here, you are on your own.
The decision has to be based on your budget and self confidence. (ASSUMING that the vendor is prepared to ship )
Based on what I saw during a short period as a courier, I would be very wary of using the usual parcels couriers to transport a machine for me.
A specialist machine mover would be more expensive, but less likely to damage the machine.
Only you can make the choice.
Howard.