Well if it's a one of a kind objet, such as an evidence that'd you pick up once to inspect, I guess 300 tris is fine, but if like Odium says its a random object that can be picked up and thrown at someone, etc, 12 tris is better. Since if every prop as small as a dvd case in your enviro/game is 300+ tris, you'd have…
Yeah 300 seems way to high. You can fake it with normal maps. 50 tris seems better. And the papers on the board should be part of the texture, not extra geometry, unless the player looks at it a lot.