Stuffers are under a lot of pressure when one is stuffing the casings...I would spend a little more money on one that has metal gears vs the plastic.
If you are not adding enough ice water or other lubricant for the meat, it will make the stuffing of the sausage difficult on the stuffer.
I was able to purchase a "OLD ENTERPRISE" from a elderly gentleman for twenty bucks.. a real steal, since they are auctioned on Ebay for over $200.00.
This very unit is still available for around $400.00.
My father has a FDick which he purchased used from a butcher shop that went out of business...Don't know how long the previous owner used it but my father has had it for 10 years and it works Great.
Have made a lot of Italian sausage and probably about 600 pounds of the old style hard salami.
Bottom line, "You get what you pay for".
Dave