I know that the OP ended up getting a higher end used box but I figured I'd give a stab at giving some insight and my opinion on how Snap on (and other truck brand) boxes are worth the money....
I've lived most of my life using what most would consider average tools and I kept them in consumer grade toolboxes. The tools did the job for the most part but I've stripped many a bolt because the wrench or socket didn't fit "right". As for the latest cheaper toolbox, I had it filled to a little more than half its capacity. It has ball bearing slides on the drawers which was nice but they wore noticeably and the latching mechanism on the drawers have failed randomly in the 5 years I've had the box, and that's only using it on weekends and on the occasional week night. I'm now in a financial position to upgrade and treated myself to a KRL722 and am in the process of filling it with pro quality tools. Am I a pro wrencher? nope. I'm a network administrator but most of my hobbies require tools. Will these wrenches make my mortgage payment? nope. Do I think the tools and the box are worth the money i've paid/will pay for them? doesn't matter because I will enjoy them and they'll be passed onto my son when I'm too old and feeble to turn the wrenches but I will guarantee you one thing, the box will still work perfectly and so will the tools. It's all about priorities and what a person can afford. The guy I bought my box from has a triple bank SO box at work with tens of thousands of dollars worth of tools in it but drives what he refers to as a piece of **** car. why? because he's a heavy equipment/diesel mechanic and his priorities are his family and what puts food on his family's table. He's not short on cash but he sees no reason to spend money on the car that simply gets him to work. it's in good running condition so that's all he needs. A quality box is worth it to him because it spends 8-10 hours a day being dragged around the shop with a couple thousand lbs of tools in it and he doesn't have the time to be worrying about if the drawers, welds and casters will hold up, much less time to pick his tools off the floor of the shop because a drawer caved in.
so there you have it, 2 guys that have owned the same box but have different reasons why that box is worth it the money.
As for the corvette discussion that's been going on in the thread, they're by far the best performance bang for the buck. I've driven plenty of them but IMO they're a dime a dozen and don't have the personality of a nice German engineered performance car - in particular the air cooled porches. But again, this is all based on preference and priorities. I must say though, his other car seems like it'd be fun to drive!
again, not to stir up **** or beat a dead horse....just giving my $.02