When I used it, it was still totally unheard of, but after a few weeks or a couple of times, advertisements for it started showing up everywhere, and the price shot up dramatically. I can't recall how much I sold it for, but it was probably in the range of 2022-2500 dollars, and while I don't remember how much I got for it, I don't regret selling it in principle because there have been no issues with it so far. Pros: A relatively lightweight mouse. It's all in the hand, really. Some mice have a slightly distinct and unintelligible feeling, but the special metal pads on the front and rear of this mouse make it slide perfectly across the mat. With the following drawbacks: After using the device for a period of six months to a year, you will find that the additional two side buttons are far less likely to be activated by accident with your thumb. Unfortunately, these additional buttons are covered in a great deal of grime, and cleaning them, even with a toothpick or any similar implement, is a hassle.