Hmm, I just realized I paid more per envelope than per blank DVD.
Well, I was just thinking that I'd rather give them out for free, or the price of DVD + Case. So I thought I could save on cases by putting them in envelopes, but then I realized I paid 10¢ per SL DVD of which I have like 50 left and 23¢ per C5 envelope.
Kinda wild.