think we would need a lot of IBCs around the garden if agri stopped collecting. ebay will be flooded with oil and the price will drop. same thing really, supply and demand. a friend of mine used to collect paper and sell it a £20 a ton recycling paper became fashionable and the price dropped to £2 a ton almost overnight. not sure if agri would bother collecting oil as that is the most expensive part of the process i would have thought.