When I was doing Amazon FBA, I found this product that was selling a lot and it was selling for $150 per item. Believe it or not, I found it for $10. Anyways, I was new so I figured, hey, If I sell it for 30, I will be able to sell it quick. Didn't sell a single item in 1 week. I then changed the price to 84.99 and got sold out in one day. Made over 2K that day.