This is a list of special droids that are seasonal or cannot be purchased.
J-4CK Halloween only
K-3RNL halloween only
6R-0WL Life day only
P3-NUT charity drive special
H3-4RT Valentines day only
RA-7 Code given from McDonald's
B3-3P5 Loot piece with Card Commander Heroes and Villians: Series One
D-OT Codes available at Emissary Events
1M-AU5 One million registered users gift
B3-T4 Beta Reward gift
NO-8OT Card Commander TCG loot piece
C-3PO Code from McDonald's Happy Meal (July 8-July 29, 2011)
7L-VN 7-Eleven SC card bonus (July 11 only)
BR-RR Life Day only