Sweet jesus. That's a lot of codices. I think of Group 4 they're all 4th edition except top left Tyranids book, and the second in from the left Space Marine book. I think those might be 3rd? I think Group 3, the hardbacks are all current or close to current, with the other five possibly being third or second editions. Group 2 is rule books I think from 3rd through to 7th; 3rd, 6th, 5th, 4th, 7th is the order according to the picture. Group 1 looks like second or third possibly? Not 100% sure, going to do some googling unless someone else pipes up first. As for how to sell them, I'd say do edition groups because that's a pretty good run across most editions (not all of the Codices got edition updates) that there are rulebooks for, and I expect collectors are going to be the most interested. Going to do a little googling. Edit: Googling achieved. I've marked the editions on the books - There are some that say 8th as well. I don't know what version you have, a couple have had 8th edition revisions with the same cover art and some haven't, so might still be current books. Personally, I'd bundle them in edition groups apart from the current ones (so 3rd, 4th, etc) and get rid of the majority that way. The price, I'm not sure of, I've not bought OOP stuff for a while. The current stuff should move for half to two thirds of current retail price pretty quickly, but might be better to shift as individual items. Not 100% sure.