I have three boxes all similar to this. Any ideas on where to go to sell them?

Mine is red and has a handle.  You got JUNK. They are cheap to buy at WalMart or Automotive parts supply store. No body is "that" desperate.  You got storage containers to hold all your money. or other junk.  I have tools in the "tool box".

used home quality tools -- maybe you can get a few bucks for the lot from someone who collects them, or cleans them up and resells them at a flea market.  you can try selling them to a flea market vendor who deals is such things. if he's honest, he'll want some reasonable indication that you actually own them and aren't trying to offload stuff you stole from someone's work truck

These are an old style mechanic's or repairman's type box. The drawers held specialty tools.   If all the parts are there, you could probably sell them on a free site such as Craigslist, or even Ebay.  

If they are all in that sort of condition, ie missing a handle, they are junk.