Have not read every post here but read most of them and wanted to put in my 2 cents due to I did not see it mentioned. I have several Pelican cases that normally range in price from $250 to $400 new. These are hands down the best cases I have ever owned and I have yet to spend over $100 for one of them used.
I watch craigslist and local facebook posts (your town/county garage sales on facebook) and look for them for close to $100 asking price and/or I offer them $100 regardless of what they are asking. Some will say "get bent" and others will sell them to you for $100 or less.
The thing is, it does not matter what they look like on the outside (scratches, dirt, and whatnot), they always look like new on the inside. They are airtight, waterproof and dustproof. You can jump up and down on them. They are so strong and lightweight. Also being airtight you can store food and not have to worry about attracting bears (given your hands were free of food while handling the case). We camp mostly in Colorado bear country.
You don't have to spend a ton of money this way. You may think $100 is a lot for a storage case? Not me, when I will never have to replace them or the contents I keep in them due to the weather getting in. And the fact that I can strap them on the outside of my rig and not even think twice about rain, sleet, snow, or bugs is awesome! Also, another neat feature is I keep clothes and bedding in one of them year round and they stay as fresh as when I put them in. You could even put one dryer sheet in there as a kicker.
My favorite size Pelican case is the im2950 for most storage, I have 4 of them. Saw a post and the guy had 4 and wanted $100 each, I offered $80 each for all 4 (normally $289 each). I also have an im3057 which is very large but it was a steal at $100 (new is $385). I have other sizes as well but you get the point. The deals are out there!
I had some from Acadamy and have tried others and found they just don't last or you can't sit on them even with the lid snapped in place without them caving in or breaking the plastic. You also have to worry about the weather, animals or ants/bugs getting into it.
Well, I hope I helped some of you with another idea for storage for gear at a discount.