Overheard a guy at the Springfield swap meet say 'if it's under $20, just buy it, you can't lose'. I think that's terrible advice. | Flea Market Finds - nhfree.com
That "can't lose" idea is exactly how my garage got full of broken power tools and weird kitchen gadgets. You absolutely can lose, it's just twenty bucks at a time. I bought a "vintage" radio for fifteen dollars that was just a hollow shell filled with dead spiders. The loss isn't just the money, it's the space and the hassle of getting rid of the junk later.