A year ago, I purchased an olympic weight set on craigslist for 400 bucks. I used it fairly regularly for a year, getting much stronger than I was before. I decided recently that I would rather have my dining room be an actual dining room instead of a gym, so I sold the weight set on craigslist for 400. Then I found an awesome table, handcrafted from the 2 inch thick oak floorboards of a 100 year old barn, made by the guy that sold it to me and used for many years by his family. It was 400.
When MMM talks about craigslist as a massive library of everything, he is spot on. If I ever decide to sell the table, I'm sure I could get 400 for it, no problem.