We get a ton of hand-me-downs from nieces and nephews, but I also found a bunch of local Facebook groups (Mom Swaps, garage sale pages, etc) where people are always selling large lots of baby clothes and other stuff for very inexpensive. Even cheaper than consignment.
We did mostly gender neutral stuff for our daughter, so we're set until around 9 months if this is a boy. Once we hit that age though people started flooding us with girl stuff. I'm hoping my sister-in-law hasn't jettisoned all her boy gear yet. That's the one disadvantage of not finding out the gender ahead of time -- you sometimes miss out as people clear things out of their closets.
Beautiful baby girl born 8/13/2012. Little star baby lost at 10 weeks pregnant, 12/18/2013. Rainbow baby girl born 12/22/2014.