Whatever you think the name is worth...triple the price. You have a targeted buyer here. I cannot think of one legitimate reason to cut them any slack. You can cut breaks to people in your daily life all of the time....that is fun to do. Unless you are running a charity then I would charge at least double the normal price if you believe the person once owned the name.
The day I sell any name I ever own for $100 to someone who contacts me unsolicited about a name is the day I quit forever.....you don't have to be able to dunk the ball, but you should at least be able to make a layup. I might let that name go for a few dollars on this board if I am in the mood, but anyone who contacts me is gonna have to pay me off. I would rather make 1/3 less sales at triple the price....you get the same amount of money, and you end up with more names for yourself.
Save the charity for people you can see in person.