"I got an offer the other day for 120k in SF. I did the math, and said no. I'd be better off taking a job for 85k in Austin." I'm a developer in St. Louis who

"I got an offer the other day for 120k in SF. I did the math, and said no. I'd be better off taking a job for 85k in Austin." I'm a developer in St. Louis who thinks about this sort of thing all the time. Look, I like San Francisco. I'm there a few times a year and it's great. But is it $60k/year more in cost-of-living better than Kansas City or Austin or Pittsburgh? What if the difference in salary is only half that? I don't know, but I don't think it's obvious.