I dont have any experience on these machines but looking at the pictures I would seriously think about it before buying it. The 4 axis looks a bit thrown together,
the nuts used as spacers to pack up the chuck, the rather thin base plate its mounted on and the slide that the tail stock is on looks like someone hacksawed the end off to get it to fit. I also hope its just sitting in this position to show it rather than this being how it fits to the machine for working purposes.
Just my opinion.

Regards

Ian