I just got an Alison in Wonderland Costume for $5.35 shipped YEAH!

Party City has many of their Costumes on Clearance for $5. Shipping is free with code PC92NB.
Thanks SD!  Note--these are SD's affiliate links as I am not an affiliate :(.
These are the Individual Costumes that are $5 each (LIMITED STOCK!!!!)

Baby Costumes:

• Baby Frog Costume
• Baby Yoda Costume
• Baby Banana Costume

Toddler Costumes:

• Toddler Girls Dalmatian Costume
• Toddler Boys Future Golfer Costume

Girls Costumes:

• Flower Princess
• Graveyard Fairy
• Double Trouble
• Alice In Wonderland

Boys Costumes:

• Chuckles Dark Clown Costume
• Tin Man Costume: Wizard of Oz
• Scarecrow Costume: Wizard of Oz

Teen Costumes:

• Teen Girls Mobster Costume
• Teen Girls Ironette: Iron Man 2
• Teen Girls Major Cutie Costume

Adult Costumes:

• Adult Bruno Lederhosen Costume
• Adult Caught in the Wind Costume
• Mens Velcro Jumpsuit Bruno Costume
• Adult Women's Tamina Costume