I am intriqued by what folks consider unusual. Here is the definition of "UNUSUAL"
The goal here it to identify and record those very different and rare machines. Different, we suggest is more obvious that rare. The rare vehicle may be under cover or even out in the sunlight when we just don't know that it was one of only 30 made in 1955!, etc. So let's get cracking and look deeper and farther and open our eyes to what may be right in front of us! This search could be a real ball!