I don't really *need* anything and the usual nerd stuff I spend my disposable income on isn't sold outside of dank, smelly caves filled with overweight, bearded man-children.

Doesn't have to be under £50 (actually last time I remember it being a ball-ache to get the leftover money transferred). Best I can think of is some pillows, or something for the kitchen. I'm sure you can all think of something better.