Don't forget the "enamel dial".
SaoDavi
This thing is hideous. Why do people even ask about these?
Care to define "slim"?
And are you okay with both quartz and mechanical suggestions?
Just size it back. It's a used watch. How would they know?
Also, $13k is a total rip for a used Explorer 2 that's at least 2 generations back.
It's possible that the wife won't know the approximate pre-owned value, nor would she now how to liquidate them for the best value.
If you are interested in the watches, perhaps you could offer her a sum that she would accept (let her come up with the price). Maybe you can pick them all up for $25k and also take them off her hands.
I had a relative do something similar. She was executor to an estate and there was a huge coin collection. She didn't know what to do with it and she wasn't about to have a thousands of coins individually appraised. She doesn't even know how to contact a professional coin appraiser. So she ended up selling it to a collector for pennies on the dollar (no pun intended) just to get rid of them.
PRX would probably fit the bill. It's slim and sporty but looks good, too.
Has proprietary straps, though. You have to get them aftermarket.
I strongly recommend, not-fossil.
Plenty of nice Citizen Eco-drive options available at that price.