And now something for the power users, if you like the cross between a trackball and a multi-button wireless mouse, the Logitech M570 is currently on sale for $25 in new condition at Amazon by Amazon proper with a limit of five units per customer. It uses the standard Logitech nano receiver so you can mix and match it with other compatible Logitech products while only using one USB-dongle per computer.

This is a popular critter, it has over 10,000 customer reviews with an average 4.5 out of 5 and has 440+ answered questions by viewers like you 🙂 It is currently the best selling trackball at Amazon, ahead of other oddly shaped trackball creatures (and miscategorized mice).