Dumps/ landfill diving help

This is my first post but I need some help! I need a lot of different materials and objects for an art project I am working on to hopefully get scholarship money. Does anyone know of any dumps that would let me scavenge (I don’t have a better word) for the bits and bobs I need? I am not buying first hand stuff just to break it and even if I shop second hand I’m worried it would still be too expensive! If you have any suggestions please let me know!