Here is a directory of some DVD & Blu-Ray Disc Suppliers. I have used some of these to source products to resell on eBay, and others I have never used. Some have a great selection and others only have a few.
Ingram
Baker & Taylor
VPD
A&E Bulk Lots
Brandywine Liquidators
Time/Life
Graveyard Mall
Glory Days Entertainment
Frontier Video
Wax Works
Buy-Rite DVD
DV&A
First Video [...]

On the first day of DVD/Blu-Ray week, I am going to cut to the chase and give the 2 largest DVD & Blu-Ray suppliers in North America. These are the big boys that supply many major retail chains, libraries, and online websites…
Ingram Entertainment
Baker & Taylor
These were my two main suppliers for merchandise to sell [...]