I bought my CMYK inks from Mesa Supplies and as a first-time buyer was able to get a 20% discount.
They sent me an email saying the CMYK kits are now 10% off.
Here's the link:
http://us1.campaign-archive1.com/?u=5b5 ... ee48864675
I'm do not work at Mesa, just looking for the best deal at any moment in time! ;)