After about a month and it malfunctions again, you should offer them about $100 to purchase it and remove it for free, assuming that you want the machine in the 1st place and want to take the time to repair it again. Cash on the glass is always the best option. "Free" appears to have strings attached to it. The history of the machine is interesting, but it has nothing to do with the actual value of the machine. Sentimental value is measured at "0" when you go to buy a machine. If the people with the machine are reasonable folks, they can always come to your house and play the machine after you have repaired it. Just my opinions...