I agree with Sharon and Prism both...
However, the first machine was checked out by a tech, but I am concerned where she said the machine is oily? the outside of it...is it leaking? or did they oil it up while cleaning the outside?
The second one states a tension problem, fixable or not? but not checked out by a tech...
The first one sounds better about taking the machine back if damaged, and also looks like they sell a lot of machines, with pretty good feed back.
I would be leery of both of these, personally...