Because of competition prices of printers are now rock bottom low. In return, printer companies are jacking up the price of their ink. And because of this high ink price, ink refilling is now common.
There are pro’s and con’s in ink refilling. One major con’s of refilling is that by refilling your printer might get clog and in the end you will find yourself buying a new printer.
I have already wasted 3 canon sp200 because of ink refilling. You might think, “this guy is stupid”. Yes, I have broken 3 printers but the savings from the refilling that i made could bought me around 8 canon sp 200. So, in the end, for me it is economical to refill but it is a case to case basis.