In about 2010 I was selling refurbished Brookstone foot massagers on eBay. I could buy them in the outlet mall by my house (one of two in the country) for $200

In about 2010 I was selling refurbished Brookstone foot massagers on eBay. I could buy them in the outlet mall by my house (one of two in the country) for $200 and sell them for $300 on eBay. It was amazing how quickly the market adjusted; eventually, we were buying foot massagers by the pallet from the Brookstone outlet. Sometimes we couldn't buy any because someone else already bought the pallet! Eventually Brookstone raised their prices. :) A year later I did a similar thing with "anti-snoring mouthpieces". The product was effectively a mouthguard, a popsicle sticks, and instructions for molding it. A few branded companies were selling this product for $80. I imported the exact same product from Alibaba for $3 each and sold them on eBay for $15 each. I had a box of 300 of them and every day I would put one or two envelopes in the mail until the box was empty.