I've been stockpiling a bunch of grease over the winter, because I haven't been driving much. So yesterday, I put an ad in Craigslist, offering it free to anyone who picks it up. I've gotten 10 e-mails in the past 12 hours from people who want it. About 80 gallons of french fry oil, I think.
Like I've said before, Craigslist is the best.