$20. The price of a good meal; far less than a tank of gas; less than most retail video games. For $20, you can also get a Mixcder HD901, a decent pair of Bluetooth headphones. Sure, the sound could be better, and common to most modern low-cost headphones, the bass is a bit overwhelming, and it lacks high-end detail. But the features included, and what sound you do get, is without a doubt, quite a bargain. Nevertheless, they do have significant flaws.
CCG writes - "The Sineaptic SE-1 is quite a remarkable headphone. It's an amazing first product from a new company. It does some unusual things like offering Bluetooth and 3.5mm inputs in an audiophile headphone. It offers an incredibly unique driver design at an amazingly low price. Its build quality is fine, but not spectacular, as long as you get one with no production issues."
Four years later and Sonos introduces a new portable speaker, the Move 2, bringing original innovation.
All in all, I’m a fan of the Cleer Arc II.T They’re brilliant at what they’re advertised for: being the ideal running companion.
That's a very good price in terms of what you get for your money.
For $20 that's pretty solid.