Sorry if I wasn't clear in the earlier post. I need a saddle type truck tool box like this......

I am a concrete foreman and need a box that can handle daily abuse. Narrowed it down to a steel Weatherguard (the pic above) or similar ones from RKI and other more commercial brand. I know some people will say a DeeZee, Husky, Craftsman etc will be hold up to lots of abuse, but every one I have ever had has had issues after only a few months use. I'll have easily a few grand worth of tools in the box, so need it weatherproof and secure.
Really just asking if anyone knows of a place to get a good deal on this type of tool box. The $400+ prices are just a bit hard to swallow.