This area will be a reference for the most valuable items in game.

In order of MOST valuable TO LEAST Valuable:

1) Unobtainable Dino: (Event Reward Only)
2) Unobtainable Dino Egg: (Event Reward Only)
3) Max Level Tame Dino
4) Double Max Level Tame Egg
5) High Quality Blueprints
6) High Quality Tools/Weapons/Armor
7) Kibble
8) RPG Ammo
9) Polymer
10) Obsidian
11) Organic Polymer
12) Tranq Darts
13) Assault Rifle Ammo
14) Shotgun Shells
15) Metal Ingots
16)Prime Meat Jerky
17) Cementing Paste
18) Gunpowder
19) Narcotics
20) Dye

These are just a general rule of thumb, if you want to trade then these items en masse should be your main focus.