Strangely enough, I've just refilled my Lexmark colour IC this afternoon for the second time, successfully, for a quarter of the cost of a new one. I've had them in the past that wouldn't register a third refill, and always assumed that there was something in-built to prevent it. I agree though, Lexmark's ICs are way over the top in price. And ain't it so annoying when one colour goes before the rest?!