stupid question

Do you guys hold on to outgrown toys or do you get rid of them?  I am totally in the getting rid of things mindset, but my sister-in-laws have held onto a lot of their toys -- not all necessary, but definitely ones that they liked.  Solomon now benefits from this by way of hand me downs and by having fun stuff to play with when he visits them.  While I like the idea of helping future young relatives, it seems crazy to hold onto stuff.  Are they the crazy ones or am I?