|Well, maybe it's not a ride on type|
I recently bought a new motor mower and happened to mention that to an elderly friend who gets her lawn mowed for her. She said that was a shame as she had a spare mower in good condition sitting idle in the garage that we could have had. I don't think she has told anyone about it though.
That got me thinking about how often this happens so I decided to sum up the situation statistically:
Number of friends she has told can have this unwanted mower if they need one: 0%.
Number of friends she informs of the mower's existence after they buy one: 100%.
Memo to self: I must remember - in about 15 years time, when I need another mower - where there is an unwanted one.