I have a bunch of modern 9.8 that are worth, for example, -$25. However, I'm holding out until I i can sell them for $1.
Joking aside, if I am correctly reading your post, I will argue that presently most graded/slabbed moderns, especially in 9.2, are pretty much worthless and will very likely remain so. (Still, never say never.) Granted, there are also many 9.8 that are, perhaps, worth a few more dollars than the cost of slabbing. However, add the associated costs and they also often result in a loss. However, a search of ebay does show that some folks (I'll write, collectors) pay above the "going rate" for some of these 9.8 comic books and, thus, some sellers makes a few bucks.
Please correct me as necessary as you may have more knowledge than I in this area.