Wanted. Old, rusted water troughs

I'm looking for a bunch of old, beat up metal water troughs for a garden project. No need for them to be able to hold water, just need to hold some dirt to grow some veggies and herbs. Any size larger than 2 foot diameter and up to 7 or 8 feet long would do nicely! If they are just rusting out around your property and you'd like them gone, I'll happily come pick them up :)