Go, Read: Facebook Thread About One Day Finding One's Own Work On Sale On eBay
Here. I like the swerve into the sales origin of the comics and materials in question and that the buyer who put the items up ends up being a fair- and rational-sounding person.
Super-small press material like this has seemed to me over the years to be more generally desirable to buyers than a fan used to scanning Heritage Auctions headlines or reading the old price guides might imagine; it's just that the market is smaller all-around than the others. It is undeniably rare material.