they are almost all above msrp (like 90% of them), most of them are like 40%+ more money, idk what these people think asking so much, but they do, don't have any new ones to recommend? i could buy a second keyboard for 30 bucks and use it as a macropad but i would like a singlehanded one
All the actual macro devices for one hand use are double what you want to pay. You may want to get a $40,000 car for half price, but at the end of the day, the item will cost what it will cost.
In the Amazon Q/A there is an answer to that which is yes with limitations. I don't have one of them so don't know exactly what it can do, but it's in your price range so is the best you will do if you don't want to spend more.