This is like cash for clunker but A/C style. I have a R-22 unit that is perfectly fine but it leaks about a pound of Freon every three years. So one day I will be forced to replace it when it is perfectly fine or perhaps(If I am lucky) to pay some exorbitant price for Freon. It will coat me over $5,000 when $10.00 of Freon would have fixed the issue.
I found out how expensive after the recent heat snap. AC was throwing kinda cool air. Called a guy to look at it and was quoted ~$500 just to charge the system. R-22 is now over $100/pound. I know the system leaks and he said it could cost $700+ just to find the leak. We're going with new.