Originally Posted by ItsJustMe

Chain rust is just on the surface. I don't buy that rust can make a chain break unless it's been sitting in the weather for 20 years or something.

As far as I'm concerned, replace the chain and the cog if it's skipping or sucking into the gear. Other than that, just lube it and keep riding.

Also, it's a bit presumptuous to tell people what they can and can't afford. If a guy says he can't afford 8 bucks, then he can't afford it. I know people who are in that position. It's pretty rude to argue with someone who says they can't afford something.