A few years ago I tried selling a large amount of generally popular DVD titles but didn't have much success.  Listing them individually was such a waste of time.  In the end I took a big photo of them all together and said "$6 each" or something for one group with free shipping, then listed another $8 group, etc, and so on.  Then as they sold I put into the description "X sold, Y sold" and so on.  That was dangerous though, as sellers continually demonstrate to this day that they don't read the descriptions very well.

For postage I simply wrapped them up in a freezer bag and then put them in an envelope (can't remember what size from Kmart, very cheap), then stuck on the label and two $1 stamps ($1.10 these days) and off it went without any issues.

In the end, no one really wanted them.  I had more luck at another website relating to a certain type of tree, if you know what I mean.

You can walk into any Cash Converters or op shops and find thousands for $1 to $3 these days.  I've almost completed my Police Academy collection at $1 each over the past few years!  Most discs are in as-new condition as well.