I don't know about that particular dealer, but I do appreciate what people have been saying here on the forum. That is, you can buy a machine from a lot of dealers, and it will probably be alright, but if you buy from one of the established businesses that knows about leather work, they will set up the machine and make sure it works well before sending it to you, and if there's a problem after you get it, they will help you out. As with so many things, the cost of the tool itself will be way less than the cost of the labor/time/effort you spend on it.
The other thing I'd suggest is to check out your local sewing community and see if there is a reputable repair person/mechanic in the area. Someone like that can help you out before and after a sale...