No, I know what it is, but to you, what is book value? To me, it's a baseline to a card's value. Sure, all the guys do is say to each other "this is a 10 dollar card, right?," but still, companies like Beckett get the job done well enough to give us a general idea of how much something sells for.
I don't sell at all, I think it's a good idea to do if it's a business for you, but it's a hobby to me. I honestly don't care about what a card books for if I have it, ok I care because they're fun to show off, but it's not like while I open boxes I'll be like "ooh, that's a 30 dollar card, better sell it now".
I mean, I hate getting ripped off in boxes, but if I get anything Yankees I'd be happy. One thing that always determines if I got ripped off is the fun factor, how much fun it is to open a certain product.
I'm skipping all over the place in this post, but, really, how do you use "book value". I use it as a baseline, but really "book value" should be what it sells for, not what a group of guys determine a 10 dollar card. I hope you understand this post, and I'd really like to know what you think. Thanks, Drew