Nah don't offer it on a small purchase. If it's already a fair enough deal, the bidder/winner needs a reality check.
I had to put 2 w/o cases in a bulk order recently, purely because of weight/safe package ratio.. But yes, you have to make sure they're secure, and FLAT, or else the inserts can get earmarked, disc indented, and the discs can even get scuffed a little as Khamenei i think said.
This was 20 or so cds to the US.. £29 Max weight 2kgs w/ tracking or ur spendin over £60 past the 2kg threshold.. If you don;t have a weight limit with your main postal service, don't even do it if it aint bulk.
No one is gonna pay $100 for tracked shipping on a purchase worth $75! So it made sense on the above scenario.
Bulk option 2, just ship em all in 20/50 capacity cd travel wallets.. You can pick em up for $1/$1.50.