I have a bunch of clothes from a niece and family friend that are about 6 years out of date. A lot of it is still fine, thankfully many expensive brands and yes some of it is so out of fashion. Some of the really freak looking stuff I have passed on or I just keep for around the house. DD1 is getting quite particular with clothes, so some items she just refuses to wear, but others (which I don't like) she loves. I would hang onto clothes that are in good condition, but get rid of ones with stains or quite ratty as they are more likey to deteriorate.