I feel you on this buddy. I own zero OA, so I can't really comment on that aspect of your quote, but with regards to value there are two kinds worth discussing.
Intrinsic and market.
I buy books for both reasons and I'm sure most of us here do. When I buy a book for my collection, it's because intrinsically I love the work, the art, the story, etc. Value is important, but not as important as the connection with the work. This is why collectors are fanatical about collecting (at least one reason). There is a connection with the item. I collect SA and moderns and there's nothing like holding that "it" book (or OA) and feeling the zen of the moment in a collectors life.
You all know what I'm talking about. I love TWD too and would collect it if it was worth nothing (probably more of it - ). You invest years into a character and story until they are really a small part of your life. Kinda reminds me of Zelda when I was growing up. I actually lived in Hyrule (Ocarina of Time ruled). You can't put a price on nostalgia, on memories, on that connection. Of course, that last sentence is wrong because these things cost money, but the feeling is intangible.
Longest post of the day, over.