Originally Posted by
Machka
The problem is with the drivetrain, not the bicycle. Chances are the bicycle is fine ... so I don't like your chances of getting a refund on it.
If you can, find a shop that knows what they are doing to have a look at it.
What does this mean? ... "When I drop it off I want a check for the purchase price."
Not necessarily true. The bike frame could be flexing enough under the rider to throw the chain.