Goodwill has some nice stuff even if it is used. I have found some really good baby clothes at Goodwill. Since babies grow so fast, most of the clothes I've gotten at Goodwill seem barely used. And, since my baby is growing so fast, why should I pay full price for new things that he will only wear a few times.
I have also found great play clothes for my daughter. Things that she is going to go out and get muddy anyway don't have to be perfect to begins with though I have often found some really good condition clothing there. I found a beautiful dress for my daughter that still had the original tags on it. The dress would have cost $29 at the original price on the tag and I got it for $3!!!
Goodwill is a good place to find used books and videos. I have never had a problem with any of those items that I have purchased there. I like saving money and reusing items as well!