Cheap pack of wired shelving?

Do you know about Freecycle? http://www.freecycle.org/ Go to the main website and look for a group in your area ('find a group near you'). Put a post up for the group and see if anyone has any they are discarding. Can't get any cheaper than that. Also, if you possibly have a Habitat for Humanity re-store in your area (we don't), they also recycle building materials and house fixtures. And you might have some luck at your local thrift stores. I've gotten organizing fixtures at thrift stores before. I don't think you care about things matching, so you can mix and match with what you find at various places if there's only one or two shelves at each.