If you have an account at peerbet you can sell your vouchers to one of two bots on the page, dice12 and voucher.  All you simply have to do is private message the bots with your voucher code and they will automatically transfer the satoshi to your peerbet account.  You can check their rates on the site but they usually range between 1:15 and 1:5 or so.  (they compete with each other which is fun to watch by itself)  Either way you can get something for your vouchers as long as you don't mind having a peerbet account.

I have successfully used both bots in the past but I've sent them only fairly small vouchers, e.g. nothing over .001.

Anyway, I hope this helps you get some more btc!  Good Luck!

Daily Bitcoins has given me the ability to bulk import codes. I can input up to 200 at a time.

FYI: It wasn't me who grabbed them