Top Wants on Wishlist:
-Deathtouch Wolf Tokens x4

FNM Promo Wants:
-Gitaxian Probe x1
-Tectonic Edge x1
-Lingering Souls x2
-Avacyn's Pilgrim x3
-Teetering Peaks x1
-Cultivate x1
-Squadron Hawk x3
-Wall of Omens x1
-Despise x3
-Gather the Townsfolk x3
-Elvish Visionary x3
-Cloudpost x1
-Oblivion Ring x4
-Terminate x1

Prerelease Promo Wants:
-Hero of Bladehold x1
-Wurmcoil Engine x1
-Sun Titan x1

Release Promo Wants:
-Thopter Assembly x1
-Steel Hellkite x1
-Ancient Hellkite x1
-Force of Nature x1

Buy a Box Promo Wants:
-Mirran Crusader x1
-Birds of Paradise x1
-Day of Judgment x1

Player Rewards Wants:
-Terror x1
-Fireball x1
-Searing Blaze x1
-Day of Judgment x1
-Harrow x1
-Sign in Blood x3

Gateway Wants:
-Tormented Soul x1

Game Day Wants:
-Diregraf Ghoul x1
-Latch Seeker x1
-Elite Inquisitor x1
-Strangleroot Geist x3
-Liliana's Specter x1
-Dryad Militant x1
-Cryptborn Horror x1

I have a few things you want but how do you determine there value?

I have the fullart Militant.

I have 1x FNM Gitaxian Probe and 3x FNM Avacyn's Pilgrims. What do you value those at?

Use this site.

http://ark42.com/mtg/pricelist.php?p=0

I have an Assassin token.