Living Social is offering a $30 voucher to elf cosmetics for $15 today. There is a limit of one per person and this does not include shipping fees. You have until 2016 to use the voucher so I’d say no worries of it expiring soon.
elf Cosmetics are so affordable to begin with, you could probably really stretch this $30 and get a lot of new products. This certificate is for select items only so be sure to read the fine print.
Head over here to Living Social to buy your voucher.

I was all set to buy this until I read, “Valid on Studio or Mineral lines only.” I know a lot of folks like those products, but please be aware you won’t be able to buy the “normal,” one dollar e.l.f. products with this certificate.
I’ve bought their products at Dollar Tree before.