John, I have a sp300i up for sale. I use another workhorse of mine(xc-540). The black/cyan printhead is not printing good. I am in the process of replacing that printhead so it will be printing proper when it goes out the door.
I have used it enough to be only on the third set of inks for this. I believe it is 3.5yrs old.
Where are you located?
I am located in Las Vegas, NV
How much are you asking?