I will have to root out the article we used to use on CC about free to good homes - I wonder if more of it is for America personally, but it says something like people who want cats for things like experiements, dog fighting etc - these kind of people wont go for any ads that will cost them money, but they will go for 'free to good home' ads. The best thing is to ask for a nominal donation, and you can either give it to a rescue, or once you have vetted the people, waive it. As Hippy says, someone paying a lot of money doesn't mean they will be well cared for, as pedigrees show, I have only paid for one of the 8 cats I have had, but they have all had good care, and in some cases cost me an incredible amount of money at the vets. I might not have had the cash at the time for an adoption fee, yet I have spent thousands at the vets, as it is easier to use a credit card at a vets than a rescue. And yes, dodgy people will avoid homechecks, if anyone quibbles, I would think again.