Toolbox replacement time. Suggestions?

Check marketplace and craigslist for a used snap on Mac or matco box. The only "big 3" tool truck box I ever had issue with was a cheaper line Mac. .and on the subject of boxes taking off on their own and rolling over I had it happen to me once as well.
Back in the 80s and early 90s one of Craftsman's first ball bearing slide equipped boxes were sold as a "PRO SET", and they were black. Biggest box seats sold at the time. And I worked at a Sears auto center when I first got it. I was the only one in the shop to "not" have a red toolbox.
That was my first "real" toolbox. It was ok at first but before long the drawer layout no longer worked for me lots of too little drawers.
But when I first got that box I cut a hole above the top drawer and mounted a car radio in it, put a 12v power converter in the bottom drawer and made boxes to hang 6x9s off the side, and drilled a hole in the side of the top box for a car antenna.
When I moved from Sears auto center to the dodge dealer, I was working a couple of bays over from my own, and I started hearing what sounded like someone rolling a floor jack across the floor. I looked up just in time to see my toolbox roll down the center of the shop behind me and a wheel dropped into a drain and down it went.
I doubt that it would happen next matter the brand now a days but I actually got sears to warranty that bottom box, I got a new one out of the deal. I then traded it in a year later (around Y2K) for the matco one I still have today.
For an at home box, I have a snap on top and bottom that I got from a local auction company,
According to the numbers on back it was built I 1987.
When I got it the drawer slides wouldn't, I took all the drawers out and unbolted the slides, soaked them in my safety kleen tank, blew them dry, sprayed them with white lithium and reinstalled them. About a year later I had a problem with a couple of the slides. I called snap on (I didn't have a rep at the time) and they sent me all new ones for the bottom box. I've had that box 5-6 years now and the slides on the bottom drawer of the top box came apart a few months ago, I gotta move the crap that has built up under and around it so that I can roll it away from the wall, get the numbers off of it (which is on the back side) and get new slides for the top chest..... Nice thing about it is that if I were to sell that box I could get what I paid for it back, today. No it isn't for sale. I ain't dead yet.