There are places like Amazon.com that will sell things in bulk as well as costco.com and samsclub.com. You will have to pay shipping as well but will save overall.
You can buy small amounts of empty DVD cases from stores like Futureshop and Target, but to get them in bulk and for cheaper the best place to go is dvdwarehouse.com
You can buy DVD cases in bulk from Amazon fairly cheaply, and you can also find that local rent stores or DVD shops have a lot spare. It depends whether you want to go for sleeves or traditional black plastic cases.
A person could buy bulk slim DVD cases from online retailers like Super Media Store. Other options are CDRom2Go, Meritline, American Digital, Overclock, and Amazon.
There are many places you can buy clear DVD cases in Houston. You can go to Hastings, Best Buy, Circuit City and Big Lots. Sometimes you can find them at Walmart or Target in the movie sections.
The single, double or triple DVD cases are the best cases for protecting your DVD against damages or scratches. You can buy these cases in bulk at a great price at these online stores http://www.shop4tech.com/z/MEDIA/1 or http://www.meritline.com/cd-dvd-cases-blu-ray-media-storage-accessories---c-7579.aspx .
Wholesale-media.com is a great site that I have used personally many times. Not only can you get a great deal on clear DVD cases in bulk, but they also have a ton of other great products for storing CDs.
There are several places that are great to find DVD cases. You can try Best Buy, Hastings or Circuit City. They all offer plastic DVD cases that can be written on to tell what is inside.
You can buy a DVD storage cases at Walmart, Meijer, Kmart, or even Walgreens. If you wish to buy them out of your home Amazon or Ebay sells them! http://www.amazon.com/DVD-Media-Storage-Accessories/b?ie=UTF8&node=509340
One can purchase empty DVD jewel cases from market stalls and from discount stores such as Poundland and B&M Bargains. They can also be purchased in bulk from eBay and Amazon.
One can buy portable DVD cases from millions of locations both online and in store. The most popular and budget friendly places for purchase are generally Walmart, Target and Amazon.
One can purchase clear DVD cases from a variety of stores. Stores such as Best Buy, Amazon, Target, CDW, and Burnsmart sell clear DVD cases at good prices.
If you buy in bulk, DVD-Rs are pretty cheap. I think under $0.30/disc, maybe even cheaper especially if you get lucky and find a 'Buy one, get one free' sale.