I am just being very nosy with the houses on the street. (Canny some might say) 
Every few months I have a little look on Rightmove/Zoopla etc to see what the house prices are like and have noticed one of the house sales that was there before is now missing. The family haven't moved, there's been no for sale sign etc and the price was there before.
Decoration and size wise it was very similar to mine which is why I've kept an eye. The last sale is now showing for the family who lived there before over 10 years ago. Why would this have happened if they haven't moved? None of the others are missing.