If you need a machine for business, stay away from "no brand" cheap chinese machines! If it is for occasional use hobby kind of thing, sure, go for it.
These cheap machines usualy have poor or non existent support, they are noisy and a bit crude. But they do cut vinyl.
If you are looking for production machine, I think that you are better off geting a used Roland, Graphtec, Ioline or simillar. These are the work horses of the industry! When I started my company I picked up used Roland CM 400 for 1200 bucks. One of the best purcases of my life!