We can all spot a Lowry today, but in 1925 this picture was bought for £10. Read about its upcoming auction for £1 million.

A plane flying upside down makes this 1930 Papua stamp one of the greatest ever Australian issues. Read about its sale here.

Another big Honus Wagner T206 baseball card sale sees the big man go for short of $2 million. Discover this legendary card ...

Lowry’s work today is really well known, but he was an unknown when he sold this picture for £10 and threw in another work for free. Now just one will sell for £1 million.