I'm a little suprised about a mouse specifically since a lot of them have kind of crappy sensors, but on the other hand, as mentioned above, a lot of expensive mice have crappy sensors too so I don't think the sensor has much to do with the price.



Expensive keyboards and chairs are more suspect to me. I have a nice mechanical keyboard at work that I like, but I suspect that the optimal keyboard for competitive games would be some sort of low-travel laptop type keyboard. And most of those gaming chairs look like repurposed automotive bucket seats to me (they even leave the harness cutouts on most of them).