Supermediastore.com has 50 pack Verbatim 16X DVDr-R only $13 after rebate. That is only $0.26 per disc.
http://www.supermediastore.com/verbatim-16-dvd-r-spindle-95058-rebate.html
http://www.supermediastore.com/verbatim-16-dvd-r-spindle-95058-rebate.html