I'm actually pretty surprised at the responses you are getting about you getting money back. Don't get me wrong, I completely agree its not something you were seeing when purchased and the seller knew this was a problem and I too think you should get money back....my experience was similar ( different seller) with a champion pub.
Ended up finding out the seller soldered a 26 gauge wire to an 18 gauge with no heat shrink sleeve or electrical tape and shoved it back under the boxer motor. This would have been impossible to see without cutting the tube around the wires. In turn this was taking out the processor.
Everybody told me I bought it and lesson learned....there is no way I could have checked this without ruining part of the machine.
The pinsider still happily posts here and feels he did nothing wrong even though he admitted to "fixing" this.
I hope you get some money back man