Dark Souls Trilogy Compendium

Hello everyone, i recently bought The Dark Souls Trilogy, after finishing Dark Souls 1 and 2 i'm into the 3 and i would like to buy the Compendium after i finish it, but the prices i've seen online are impossible (1k+) where i can find a good link to buy it at a reasonable price?

This is probably not the right place to ask but idk where to go, thank you regardless