1p - although it also depends on the type of floor.
The playground in my high school was completely littered with 1ps and 2ps, no one wanted to be seen picking them up. Ocassionally if no one was looking I'd pick up enough for a Freddy bar (10p).
Now things have changed completely according to my younger siblings. Someone will throw a 1p just to watch the scrum that ensues! This isn't a joke, I couldn't believe it.
1p, im a scav, but i will occasionally put it in a charity box.... :P
1p...As somebody's already said, they all add up!
I'd definately pick up 50p if I came across one.
I found a £5 note while walking my dog through fields a couple of weeks ago.
Probably 5p, but there's almost always people around
1p. I always pick up any coins or notes I find.
I tend to find notes more often than coins though. I've found £20 notes on the ground on 3 different occasions; I'm amazed at how many people just walked straight past it.