How can I assess the value of my crop sprayer with a view to selling it? You can visit the Terre-net Occasions web site or any other site selling second-hand agricultural equipment which will enable you to compare your equipment with similar models on sale and give you a better idea of the sale value of your BERTHOUD equipment. However, these values are not official. They are only an indication of the average resale value of your sprayer. For more reliable information, consult your dealer.