One of the best deals you'll find is from a divorced women who's selling her X's stuff and has no idea just how expensive that Snap-On box is.
I'm lucky enough to have two Harbor Freight stores within 20 minutes of home. I have looked closely at their 43" box. I found it superior to their more expensive and longer 56" box. The 43" seems to have a stiffer structure and a sturdier drawers. Technically speaking I may be wrong but the 43" just feels better than the 56".
Having said that I've had my bottom (black) Craftsman 7 drawer for uhmmm....erhhhh....23 years. It is still fine but a little too full. The top (black) Craftsman 9 (?) drawer box is about 14 years old, also fine. I am in them alot for just a "regular guy wrench turner" and they are still perfect just a little dirty and scratched up.
If I get another box it will be a 43". I will "try" to get a used Mac, Matco, Snap-On, Cornwell, etc.. box.
If I can't pull that off I will probably get that 43" at HF. Similar Craftsman box is nearly twice the price.....
Damn....it makes me feel bad (unAmerican) even considering the HF over the Craftsman.