Don't really collect them but I seem to have kept a few over the years.
A couple were in my bag when my car was broken into and my laptop stolen.
£1800 worth of damage to my car for a 3 year old laptop with a knackerd battery and a Bitlocker on the motherboard so scrap!
But I was more upset about loosing my first 2 GSM mobiles.
Worthless at the time (2004)
One of my favourites Is my Motorolla Razor But I got fed up after changing the flex pcb twice
Cheers
Mike T