Quantity 
Genuine Epson ink cartridges 
CCSDigital.com Epson ink cartridges 

single use 
single use 
refillable 
reusable 

$15.00 each 
$3 each 
$4 each / $2.50 refills 
$4 each / $2.50 refills 

7 ml of ink per cartridge  15 ml of ink per cartridge  25 ml of ink per cartridge  15 ml of ink per cartridge  
6 after $2 Staples or Office Depot credit 
$90  42 ml 
$2.14/ml  $21  90 ml  .23/ml  $23  150 ml  .15/ml  $22  90 ml  .24/ml 
$78  42 ml  $1.86/ml  $9  90 ml  .10/ml*  $15  150 ml  .10/ml  $10  90 ml 
.11/ml 

13 after $2 Staples or Office Depot credit 
$195  91 ml  $2.14/ml  $40  195 ml  .21/ml  $40  325 ml  .12/ml  $40  195 ml  .21/ml 
$169  91 ml  $1.86/ml  $14 
195 ml  .07/ml*  $32  325 ml  .10 ml  $14  195 ml  .07/ml  
*Note that Epson printers often report the cartridge as empty when there is still ink remaining. With singleuse ink cartridges that remaining ink is wasted, so you really don't get the full value. With reusable and refillable ink cartridges, the chip resets to full.  
This is the best value if you don't have a Staples or OfficeDeport nearby or can't be bothered to return empty ink tanks for store credit. Just 12 cents per ml!  
This is the best value if you plan on returning the empty ink tanks to Staples or OfficeDepot for $2 in store credit for each. Just 7 cents per ml! 