According to backpack.tf, a Purple Energy Samur-Eye is worth 7.3-7.7 buds, and a Sunbeams Armored Authority is worth 6.6-7.5 buds. Unless you value the Authority at its lowest and the Samur-Eye at its highest, he overpayed a bit with that bud.
Unusual prices are pretty loose though and not really set in stone, since (unless you're purely marketing them) how valuable they are depends on your personal taste on both the hat and effect.
(All this is coming from someone who doesn't own a single unusual (not including the HHHH), by the way.)
Unusual prices are pretty loose though and not really set in stone, since (unless you're purely marketing them) how valuable they are depends on your personal taste on both the hat and effect.
(All this is coming from someone who doesn't own a single unusual (not including the HHHH), by the way.)