Cash in on Other's Buyers Remorse

When I see people shopping for furniture or large appliances at high end retail shops, I often wonder if they've tried first looking for stuff through local buy and sell classified ads. Because those are great places to start looking before resorting to new. If you're patient and have enough follow-through you can often find exactly what you're seeking--and often it's barely or gently used and at a fraction of the cost.
I mean for instance, say I was looking for a stationary bike or an elliptical trainer which starts at about $2000 for a decent one. Of course if by some sudden emergency you need an elliptical trainer today, finding one in the classifieds may not happen but if you can spare a couple of weeks and maybe a gallon of gas, going to a few places to see used ellipticals--sold by private individuals, then you can often cash in. You could probably get one for about $500 or less, depending on the level of desperation to sell.
Because people like you, also buy things at full price when they think they need it. And often the realization that they didn't need it after-all and the accompanying buyers remorse, doesn't kick in until over 30 days out, at which point it can't be returned. It can only be sold through a private sale. And if you happen to want one, then you could be in luck.