Pots
Round, 6.25 x 6.5, $0.30 each + shipping: http://www.amazon.com/Plastic-Nursery-Gallon-Trade-Holds/dp/B0055PERPO/ref=sr_1_9?ie=UTF8&qid=1432145615&sr=8-9&keywords=gallon+nursery+pots
Square, 5.25 x 5.25, $0.36 each: http://www.greenhousemegastore.com/product/belden-jumbo-square-pot/square-pots
Square, 5.25 x 6, $0.31: http://www.greenhousemegastore.com/product/coex-square-pots/standard-plastic-pots
Round, 7.5 x 6, $0.41 each: https://www.growerssupply.com/farm/supplies/prod1;gs_pots_trays_containers;pg109632_109632.html
Round, 6.25 x 7, $0.28: http://www.growersupply.com/tradgalcon.html
Plastic grow bag (one time use), $0.18: http://www.horticulturesource.com/grow-containers-pots-grow-bags-planters-net-cups-mesh-pots-neoprene-inserts-buckets-lids-liners-etc--c36/plastic-grow-bag-1-gallon-p3394/