Ikong via Amazon offers this Ikong 410XL Epson-Compatible High-Yield Inkjet Cartridge 5-Pack, model no. IKONG410T1, for $35.99. Coupon code "CBLGXS94" cuts it to $25.19. Plus, Prime members get free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $7.04.) These cartridges fit several types of Epson inkjet printers; use the compatibility list on the product page to check specific models.