In Search Of: Cloth Diapers/Covers

We have finally begun embarking on cloth diapering for our 3 month old(15 pounds) and our 2 year old(29 pounds). I am looking for large lots of cloth diapers, both new and gently used, for both boys(AIO's, pockets, fitted, prefolds, covers, etc...). I am starting from scratch, so I need everything and would like to do it as economical as possible!
I will probably need Mediums, Larges, and X Larges. Please PM me ASAP! Thanks