Time and time again people come on here claiming they can teach carding. Carding is self-taught through trial and error.
I suggest you be careful before wasting your 33lr :DD
http://www.ebay.com/itm/Zebra-Silver-Semi-Dimensional-Ribbon-1000-prints-/380342842135
you're welcome...
But from what I hear its not as good, but maybe those people are not sure how to do correctly.
There are over 26 sensitive sensors on these machines, the problem with finding these refurbished is the cost of parts to repair them. The guy I go through services these for the bank and wrote a custom software for it. Well worth the price.