I've just started a new job, and as part of setting up my workstation I requested a new, larger mouse - as I've had experience with hand cramps with the standard small mouses that are everywhere.
We looked at the existing spare mice, and there were none suitable there - so my manager asked me to find the mouse that I want and send it to him.
I've done so - but the mouse is the upper end of the price range for computer mice ($100+ - local currency - not the US) - the Logitech MX series. It's not like I've gone out and looked for the most expensive mouse - I've had experience with the brand and I know that these work for me. That said, I'm sure I could shop around more and find a cheaper mouse, saving say $50.
It all seems a bit absurd worrying about what's less than a day's pay difference - but I'm primarily concerned about the impression I might make - as a prima dona.