Hundreds of Free plastic trays. Used, bit tired, dirty, but loads of uses.
Lined with plastic make great seed trays!
Wired together on their side with bit of wood to make small fence to divide broody coops. (Have to use your imagination for that one!)
Collecting fruit, carrots, grass clippings, etc.
Shelving for little things in garden sheds.
Propping up stuff (I use stacks of them to get my brooder (an old single bed frame) a foot off the floor to save bending down).
Spaniel for size scale....edited to add, had to crop spaniel out of photo. Stack of four = a sitting spaniel in height. You can see shed brick behind for scale.
Some more tired than others, but you can pick the ones you want.
Free.
Montrose/brechin/forfar Angus. O78 467 I3564.
May be able to deliver locally if you're stuck, for cost of fuel.