I have several grades of 55 gallon blue plastic drums/barrels:
$10 - Good condition, previously had ethylene glycol (antifreeze/coolant) or paint solvents in them. Not good for animals. Mostly blue, some black, or white.
$15 - Excellent condition barrels, clean (usually), most of these had cleaning chemicals in them. OK for watering landscaping, not good for animals. Mostly blue, some white or black.
$20 - Once used barrels, like new. Previously had an industrial soap in them and usually clean. They shouldn't be used for drinking water but good for everything else. Perfect for aquaponics and livestock, black are perfect for composting. Available in blue, black, or white.
$25 - Clean, once used, food grade barrel. Good for all uses including drinking water. Available in blue or white.
They all have two 2" openings on the top and come with the plugs/caps. Not all are the same style top as in the pictures.
Pickup is SE Tucson, just North of Houghton and I-10.