CANON BCI-3eC CYAN INK TANKS (2) CANON BCI-3e COMPATIBLE BLACK INK TANKS (4) $10.00 for all
Brand new, never opened.
My Canon S820 finally died. The 3rd-party Canon compatitable tanks are what I used to use for my blacks. They were way more cost effective than any other brand I found and worked beautifully- no issues. If you're like me and ran through tons more black ink than any other color (in a photo quality printer with individual color tanks) then these will work nicely for you.