...the black kind you get with your nursery plants? A local Humble, TX lady who lives close to the big airport has literally 1000s of pots in every size. They are used but veryy useable. 1,3, and 5 gallon are 20 , 30, and 40 cents each. She has a pile of pots with small tears that are 1/2 price. I found 15 gal. pots $1 back there. $3 -27 gal. tree pots and 50 gal. tree pots, too. I won't post her name here but tree mail me and I'll give you her name so you can make arrangements to meet via Facebook messages.
Heres my haul I got for $40