I have a customer that bought a Stihl FS 55 Trimmer new for $199+ tax. He has used it 5 times at the most because he came down with Hepatitis C and could not do strenuous work anymore. The thing looks perfect, has sat in his garage, and is practically brand new. I want to buy it from him for a gift to my dad for Father's Day. How much should I offer? I was thinking of trading some work for it - $135 worth. What do you think? He's kind of desperate to get rid of it because he can't use it anymore and he's selling a lot of his belongings because he's downsizing to a smaller house with less storage. And we've done bartering before on other equipment and items that he owns, which I now own.