A 30-day return policy is pretty liberal. You could knock up a keyboard pretty good and still get your money back - wow! I agree with Al that one should do the research first, then buy. Two weeks is more than enough time to know if you've made a mistake, AND if you've banged it up there definitely should be a penalty - maybe even cancellation of the return policy.
I spend a whole lot of time resarching and debating before I make a major purchase. I make sure I play the keyboard before I buy and know what the high and low prices are. I certainly don't want to buy a damaged, used product especially if it's being sold as new. I have no problem buying a floor model, if that's what it is, but not having manuals and software is unacceptable. As is the case in many areas of retail today, the customer has become the enemy.