List of Random Retired Trick or Treat Costumes (list posted by Ian in the help forums) available for 4AU each -

[x] Beelzebub Costume
[x] Black Death Costume
[x] Black Skeleton Costume
[x] Bloody Barber Costume
[x] Criminal Costume
[x] Death March Costume
[x] Doctor Costume
[] Dracula Costume
[] Evil Ghost Costume
[x] Graveyard Keeper Costume
[x] Gremlin Costume
[x] Grim Reaper Costume
[x] Headless Horseman Costume
[x] Killer Sindi Costume
[x] Loose Mummy Costume
[x] Lycanthrope Costume
[] Mr Skeleton Costume
[x] Mrs Skeleton Costume
[x] Nefarious Cloak Costume
[x] Nefarious Fairy Costume
[x] Nurse Costume
[x] Onryo Costume
[] Pumpkin Costume
[x] Red Death Costume
[x] School Uniform Costume
[x] Sinner Costume
[x] Speechless Ghost Costume
[x] Superboy Costume
[x] Supergirl Costume
[] Teenage Sorcerer Costume
[x] Teenage Vampire Costume
[x] Teenage Witch Costume
[x] Tight Mummy Costume
[x] Undead Bride Costume**
[x] Undead Groom Costume
[x] Vampire Girl Costume
[x] Vintage Devil Costume
[x] Vintage Pumpkin Costume
[x] Vintage Werewolf Costume
[x] Vintage Witch Costume
[x] Zombie Fairy Costume*

Eek, 14 missing at the original time of this post. I was actually expecting to be missing more, so could have been worse. 56AU total cost, though. Ouch.

*Gifted to me by a very kind person. Thank you.

**News post on 10/4/17 added this former dress to the list as a costume now. I believe this is the only costume that wasn't on the original list.