Kennedy toolboxes are some of the most under-rated and under appreciated toolbox's on the market. Even their friction sliders are IMHO the best available. That ones easily worth $100.
Kennedy also will sell replacement parts so if a drawer needs new slides just let your offer reflect and not just walk away. From the pictures my high would be $125 but it all depends on how much you want/need the box.
~$250 tops, depending on in person condition of course. It has the older style slides, which is a bit of a turn off, but still very useable, that is if not worn out.