Really not sure how you arrived at any of this. I mean, obviously, right?
LR's assumptions and presumptions aside, ComicLink, ComicConnect, Heritage, or the like gets your buddy a well-funded, experienced selling avenue where the auction house handles incoming money, deals with shipment, does customer service on seller's behalf, and basically makes the experience hassle free. For a $100.00 book, that's a small value, but for a $10,000 one, it's an enormous benefit. It might also be worth providing them a list of the remaining comics to see what's worth getting slabbed.