I quite often pop into charity shops for dd's clothes and have found some great bargains for everyday messing around stuff.
Love hunting out stuff for myself and house too in flea-markets etc although conflict in this respect with dh who prefers to buy everything brand new. He loves to tell me I'm buying dead people's things.
Have to admit I much prefer the battered 'vintage' look to the 'box-fresh'. It's better for the environment, and, I like to think, more creative! How about you? Do you have any qualms about buying s/hand?