Leon, when I was breaking up that set, I did have a few people ask me about grading, but none of them bid
. Most people don't care.
The way they are currently being slabbed does not do them justice - I think if this has to be done, they need to be put in something more like the PSA/DNA photo slab. But I'm against it, just like with photos.
Regarding the question about pricing, I don't know about the Cobb/Wagner, but I have a Wagner in similar condition to BMW's, and I wouldn't sell it for any less than theirs is being offered (but mine is not for sale). It's a clearer photogravure than the Wagner/Cobb, and it's as classic of a Wagner image as you are going to find.