Netflix crisis!

Aaaahhhhh!!!! I accidently sent my own DVD back to Netflix! Now they have my Alias Season 1 disc 2, and I have their CSI:Miami Season 2 disc 6! It totally sucks because if I had accidently sent back something like "Office Space" or "Anchorman" I could just go to Target and buy myself another one, but how am I supposed to get another copy of "Alias Season 1 Disc 2"? I'm going to put an ad on Craigslist and see what happens. And I guess I can keep Netflix's DVD, since they're keeping my DVD, but there's a lot of movies I'd rather have for free instead of "CSI:Miami Season 2 disc 6".