Here in CT we have stores called Once Upon a Child. It is a chain of thrift stores that have tons of clothing all in season and toys that are gently used.
I buy alot of toys and videos there for my grandson. I just got the Little Tikes tunnel with the train and tracks, car and tracks and lots of extra tracks and cars for $6.50. I clean the toys again after I get them home but they are usually very clean.
The clothing there runs anywhere from $.50 and up, but most of the stuff is top name.
I know there are other stores in different states that are similar. Do a search on google for infant clothing consignment or thrift. Peggie