I'm working on the sale of a glider from a deceased club member for his estate. The estate has no idea how to sell a glider and what level of effort is involved. What is a fair brokerage fee (percentage) to handle the transaction for them? I plan on putting the glider on several websites and marketing it locally. I'll be handling inquiries, showing, the sale and paperwork to transfer ownership. Obviously I'm not a professional broker, just trying to help them but they have asked what a fair fee would be.