The TechGeek.com has a sale on shiny top MCC (unbranded) coded DVD-r for $35.99. Use coupon code MCCDEAL and $16 is subtracted from the final price. The shipping (UPS ground) is free. I paid $23.14 for 100, including California taxes. Not sure about the quality of these MCC disc.
MCC DVD-r 8x 100 for $20.00 shipped.