Selling 2 black ink cartridges and 1 yellow and 1 magenta cartridge for $10 a piece, or $35 for all 4. This is super cheap.

They are #69 cartridges, compatible with the following Epson models: CX5000, CX6000, CX7000F, CX7400, CX7450, CX8400, CX9400Fax, C120, NX Series and Workforce Series Products

http://www.amazon.com/Epson-T069120-BCS-DURABrite-Ultra-Cartridge/dp/B002P71T4M/ref=pd_cp_e_0
http://www.amazon.com/Epson-Series-DURABrite-Cartridge-T069120/dp/B000HZGQCY/ref=pd_cp_e_1