That's a very nice setup, I have the same boxes, but without the mural. It's about 33" wide and 18" deep. That one looks mint. If I was selling I'd try and get a thousand for it. If buying, I'd try and get it for $800 or less. Keep in mind, there will be dividers in the drawers which will limit the way you can configure it.
I find these snap-on boxes have wide ranges of prices. The guy who bought it new typically wants a tone of money for them because he paid full boat retail. Or if they are older, they might just want to get rid of it and aren't looking to make so much money.
In that condition with the mid box 1200 is ok. Hard to find one that nice. Mural almost works against you as it narrows the field of buyers to those who like the artwork.
Yea, I've seen that with bench vises and other stuff as well. Thankfully there is a large enough pool of goodies around the mid Alantic (if I can keep Twertsy distracted) that prices remain reasonable.