CheaperThanDirt's shipping is what gets you. I generally don't shop there anymore because, in my experience, other places usually have what I want cheaper. The main reason I go there is to get reviews on products I'm looking at buying elsewhere. Their review system is the only thing that really shines.
Food for thought: an old .30 caliber ammo can perfectly holds EXACTLY 500 rounds of Wolf 7.62x39 in their individual 20-round boxes, with no room to spare. This makes it a perfect range box. Not too heavy, not too bulky, and has a handle.