I bought mine from Ray (who clearly bought his from Maryland cork). Shipping is expensive from Ray (not complaining), but the one-stop-shop for everything I need including my new reverse osmosis system is very attractive. Ray also sells in amounts that are reasonable for someone at my stage of hobbying. I looked first at Maryland Cork based on conversations on this forum, but the minimum shipment is way too much cork. Hopefully as I continue to build relationships in the orchid community (and as my needs "grow") I'll be able to begin purchasing cork with or from larger growers. For now, though, thanks Ray for making it easy!