I really really really don't see the benefit of buying a box that costs as much as a car. It's a metal box with metal drawers... Only way I'd consider paying 5grand for a box is if it came full of tools.
Pride of ownership, organization to make jobs go faster, protection against thieves, joy of quality, etc.
But that is why there is chocolate and vanilla. We all chose to spend our disposable income differently. I have a $350 pool cue. Some would say I wasted my money and many a good shooter would say I didn't spend enough.
Oh, to the OP. If the box is new, that's a decent deal, used its too high. If you are patient and diligently watch CL (if you are in a populated area), you will find a deal on a used box.