Stackable metal storage crates, 40x40, about 36 tall, fold down flat - $100 (scotts valley)

I have some metal storage racks from the 1980s 7 or 8 in total The fold up into a box or crate, and are open metal design We used them to store excess material, but no longer need them They were blue and do have wear and tear but functional for sure.
May have been built originally for Atari.
.
.
.
.
.
Can use a pallet jack on them when loaded.