Howard and I looked up the capital of every state in the US for starters and posted a Craigslist ad with the same title on every single ad, “Looking for an Xbox 360 for sale cheap”. We didn’t list the actual price we were willing to pay. We wanted a new one, or mint condition. We wanted to see what sort of reaction we’d get. We got a total of 3,689 responses. I had no idea the secondary market was so huge. We set up a search parameter “mint condition” and discarded all the responses that didn’t have the phrase. We were down to 92.