So, Cambridge. No way that I was going anywhere near Newmarket Road while the sales are on, but there's a place in Chesterton that I use on occasion. So, I arrive there, walk in the door, and say "Hi, I want a 4-button optical mouse, USB, preferably not wireless."
And the assistant turns to a bin behind him, and picks out a mouse wrapped in a plastic bag.
Yay! It's the identical model, but it works without the LED giving up, and the left button isn't half broken, and OMG, I'd forgotten how much difference a proper working mouse makes with some things. So, no driver disc (hey, Windows seems to recognise it), no armoured packaging, but it works. And it was a fair bit cheaper than it would have been a few years ago when it came with full packaging.