eBay can be a crazy place. I know someone who has done quite well selling on eBay.
One of the more extreme sales I recall this person making was taking a couple pictures of a low-end camping package with tent and chairs all setup in a nice display at one of the big box stores - it was on sale for something like $90. Posted the pics on eBay without even owning it. Made the sale to the high bidder for something like $150 + a high preestablished shipping rate that would add to the profit. Then, went back to the big box store, bought the item on sale, shipped it off, and collected the profit directly using PayPal. He also browsed sales bins, Goodwill stores, and rummage sales in upscale neighborhoods for items to resell. Not the most honest form of business and something I couldn't do myself, but his methods did help in putting himself through college.
Latest money making adventure involved picking up a snowblower at the end of someone's driveway that was being thrown out because it "was junk." Brought it home, found that the plug wire was bad, replaced the plug wire, waited for a snowstorm to post it locally on Craigslist, and sold it for $250.
As a previous poster pointed out, there seems to be a buyer for everything, even at slightly higher than market prices.