I just thought I would share this information:
There is a children's consignment sale next weekend in Whitinsville through http://www.dejavucouturesales.com/ . I haven't shop at this sale but my cousin does and says it fantastic.
Some other consignment groups in the area that will be have good sales:
http://www.consignmycloset.com/ (Last year sales were in Marlboro, Leominster & Bedford)
http://nextsizeupkids.com/ (Have had sales in N. Attleboro, MIlford, Franklin) - I got some great stuff for Olivia here when I was first pregnant.