I work in a Guitar store, and I had a great one today.
I had a gentleman exchange a stand that HE lost the screw to, and he bought this stand in March, well over our Thirty day return/exchange period, which is printed several times on the back of our reciept paper. When asked which manager told him he could exchange it, he (obviously) couldn't remember. And, our store being the way it is, we ended up exchanging the stand anyway.
I guess I'll see it in another three months.