I believe that 67423 is the same top chest as the one in the combo:
http://www.harborfreight.com/11-drawer-roller-cabinet-67421.html
I bought two of these combo sets on sale @150 each, and sold the bottom roll arounds for $40 each. So out of pocket was $110 for top chest & intermediate 2 drawer.
That said, one top box with intermediate chest holds nothing but drill bits, the other holds various hack saw, jig saw, recip saw blades and hole saws, with a drawer devoted to locks and keys. The other intermediate chest holds all my crimpers and crimp terminals.
Obviously not the same quality as the red HF boxes, I would say they are about equal to the similar Craftsman boxes at a better price. While not ball bearing slides, they work well enough for storage purposes. Overall quite happy for the money. (And yes, I have higher quality toolboxes - Craftsman, Kennedy, etc).