Lowe's generally has the lowest prices @$49.99.
Years ago I was pitching an idea to A-O Safety / Peltor (now 3-M) and my idea was the worktunes headset with a button that would interfere with the FM signal of any nearby worktunes.
We affectionately termed this 'musicus interruptus'. The thought was even if you and your crew were working in a high-noise environment and everyone was cranking out the ..... Mozart.... a 'click-click' would let a man know his attention is needed.
Initially I was pitching 'MusiCom', a worktunes set that had communication ability, but when told it would be ~$600 per unit and would have to be purchased two to a set, on behalf of you guys, I said our industry would not pay that. A whistle is cheaper.
I said that it is almost of equal value to cut into a guy's music (or into his silence if the volume were all the way down), and that a simple 'click' into his ears was truly enough.
This was at the time when the Worktunes had two rotary dials, one next to the other. You never knew which was on/off-volume and which was tuning. I suggested a tuning dial, bigger around, with three indents to correspond to your thumb, index and middle finger if they are all pressed together. Surprisingly, they went with it, and it looked like the following.