Like most Magic: The Gathering cards, the value of Gilgamesh, Master-at-Arms depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Final Fantasy)
Thrasios, Triton Hero often chills in the command zone until you have infinite mana to feed into its activated ability so you can draw your deck and win with Thassa's Oracle, but you can also exploit the activated ability with cards like Training Grounds and Seedborn Muse
This unassuming equipment triggers when the equipped creature attacks, dealing damage to the defending player equal to the equipped creatures attack
Every other starter deck has bigger characters that will run this deck over, even with its variety of Resist cards
So at least you still feel like the character is there somewhere