I don't because I feel that everyone should take a good care of their tools and while wear marks and some light tarnish are a sign that the tool was well used and well cared for, the aggressive greening is more indicative of neglect.
For example my Zelos Horizons shows signs of tarnish in the grooves of its crown and bezel but the case is relatively clean because I wipe it regularly with a lightly oiled microfiber cloth. From past experience with other tools made of brass I'm confident that this will keep it in pretty much the same conditions for years or even decades and that this is the way a bronze watch should look like.
But that's only my opinion, how do you feel about this?
I'm a big fan of watches that are interesting because they are either unique, have interesting features, well designed or simply offer a great value for their price.