Craftsman now sells three 8 drawer 401/2" top storage boxes.
For $249 you get a box with quiet glide rails.
For $299 you get the same box, but with ball bearing rails.
For $329 you get a better box (a bit more refined finish in assembly detail) with reinforced angled front lid, better (somewhat stronger/different design) locking system.
The $249 and $299 boxes are fine for in-home boxes. As such, it's kind of a waste to have locks, as the locks are designed as an afterthought--the locking system could easily be overpowered.
The $399 box's locking system is nothing to brag about even if it is heads above the $249 and $299 box's system. What you do get is a better finish in construction (a bit more rugged) for about $30 dollars more and to get anything better will set you back at least $100 more.
None of the systems are the type needed for use in a commercial shop, but then none cost $550-800 dollars.