Logitech Mouseman+

(http://2a.zol-img.com.cn/product/117_500x2000/44/cepKXmRt1Cs...)

Best ergonomic mouse ever made. Fitted my hand perfectly. The extreme slant looks terrible but works far better than every handed mouse I've used in the 20 years since. There was a matching trackball if you preferred that.

Unlike every modern Logitech mouse made it did not break after a short life. It was thrown away because it was old school marble instead of laser. Lasted years in great condition.

Use that design with modern sensor, sell me one for £150, I'd buy it.