Got a new mouse for free yesterday while buying a new set of RAM sticks
for my laptop. It's a Labtec Notebook optical mouse.

http://labtec.com/index.cfm/gear/details/EUR/EN,crid=29,contentid=683

Would have costed me about 125:- sek. Im a dumb-ass when
it comes to maths, so i'll leave the rest for you guys