I've too have tried giving stuff away for free and I always the worst experience, unappreciative people who want to manipulate any way they can, or no show etc.

But when I post it for a low price it completely removes that group and suddenly I get nice people who have wanting this thing for so long but struggled to afford it and they will go out of their way to meet up. Usually I just giving it to them free after they've been so easy to work with and their mind gets blown. They show initiative, they work hard for what they want and get rewarded for it. This is the way.