A:AnswerI've been to several locations recently and every store I've been too has had them in stock. so really it all depends on where you're located and how popular razer products sell in your area.
A:AnswerYes, it comes with either linear red or clicky purple optical switches. I recommend the linear red switches. It might cost a bit more but its worth the price.
A:AnswerIt will not work unless the USB port on your monitor serves as a passthrough. You will need to plug the Huntsman Mini into the same PC that the monitor is connected to for it to function.