Because something is expensive doesn’t mean it’s going to be useful. Some of the most wildly clever items we’ve found also happen to be the cheapest — and they’re right on Amazon. From truly unique lamps for enjoying scented candles, to an orthopedic neck support that feels so good to stretch out on, the finds below are so freakishly clever you’ll wonder how you lived without them. Better yet, you can add this genius to your life starting at just $4.