$15 or lower (order is based on release; 27 attires)
Thancred's Modish: $15
Y'shtola's Modish: $15
Ward Mage's: $8
Ward Knight: $8
Aymeric's: $15
Blackblossom: $12
Scion Liberator: $12
Distressed Manderville: $12
Lord Hien: $12
Gosetsu: $12
Minfilia's Modish: $12
Krile's: $12
Brave New Y'shtola: $12
Brand-New Alphinaud: $15
Oracle: $12
Omega-F: $12
Omega-M: $12
Lyse's Leadeship: $15
Gaia: $12
Brand-New Alisaie: $15
Ice-Heart: $12
Crystarium Prodigy: $12
Moogle: $12
High-Summoner: $12
Abes: $12
Graha Tia: $12
Zero: $12
Belt-leather Beret and Fingerstalls Set: $6

$22 group (3 attires):
Streetwear, Leisurewear, Fat-Cat

$18 group:
48 different attires