How much rust is too much?

Didn't vote. Like others said. It is dependent on your money and/or your skills and tools. I wouldn't hesitate to get rid of it as one piece, not part it out, because someone may want to save it.
X2 ...... In fact, I have fixed worse that was worth less. But, I also have the tools (MIG, brake, bead roller, plasma cutter, etc.) and some experience. But, that experience didn't come from giving up. Just remember, every Mopar that is parted and or scrapped is one less for us, our friends, and future generations.