my $0.02
if its in good shape (rust, dents, slide action, etc.) i think its worth up to $2000.
hard to tell from the photo but the bottom edge looks like rust that comes from being in a damp environment OR kept outside for some amount of time. if after looking at it closely in person i felt like it had been kept outside and there was edge rust inside and out, I'd walk away.
You indeed can see fair few blemishes in 1 photo so in real life viewing it will be worse.
If it not rust and not too bad and drawer slides not shot it still worth sensible coin .
My first thoughts is it like 1500 bucks box if slides and wheels good and you looking for a sturdy 3 bay work box and like the drawer layout, the orange is washy looking color, it not above average tidy and by times you clean it up, buy and fit drawer liner/top mat or work surface of some sort you will be into it few hundred more and wouldn't want major issues of slides or wheels to deal with even if possibly get some of it free from snappy .
The reality is you don't know a true price until see it and if still interested negotiate a price .
You don't sell boxes that quickly or hassle free unless they proper tidy or sensible negotiated final selling price ...