Vintage modular plastic storage shelf, retro yellow Mr. Cart in 70s 80s box

Retro late 70s or early 80s vintage plastic storage cart for home or office, made by Dart Industries, Los Angeles. This is great, bright sunshine yellow color, mod lines.

It's 16" x 12" x 30" overall and comes complete with wheels to snap in the bottom basket if desired. It's never been used, we opened most of the original packaging ourselves for the photos.

There's a little soil to the original box, and a chip at the back of one tray, as shown. We've looked in the box, and don't have the chip - but it's not very noticeable, even with the cart empty.