You can buy a second hand costume. As it gets closer to Halloween time look on Craigslist.com for one. Also, you can look on Ebay.com and win the bid!
I couldn't find any stores where you can purchase alien costumes besides online retailers. I found them at Amazon.com, Newegg.com, Buy.com and Buycostumes.com.
If you want a cheap, used Minnie Mouse costume, I would suggest Ebay. Amazon.com and a local costume store are not bad ideas to check out as well. Good luck!
You can find good adult costume for cheap at walmart, K-mart, Target and other stores. You can find them online at websites like ebay.com,amazon.com, and partycity.com
You can find cheap halloween costumes for infants at ebay.com. You can also get one for free, just pay the cost of shipping, at thredup.com.
You can't.
Get a costume from any Halloween store, especially from Walmart as they are very cheap and you can print coupons online. Or you can go and get a white jacket and white hat and there you are, a nurse.
Ebay is probably going to be your best bet. They always have a ton of costumes and costume accessories for you to choose from.
On Ebay :)
You should have no problem getting a Halloween costume for your daughter. Alien costumes are available on many different websites. Please see the following: www.costumes4less.com/Aliens_Costume_AS-SC_Store.aspx
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A cheap Batwoman costume can be found on eBay or on Amazon. They can also be hired cheaply if it for a one off party from many stores that do costume hire such as fancydress.
Party City is a great store to visit for all of your party/Halloween needs. If you prefer to shop online for a warrior costume, spirithalloween.com and costumecraze.com are great websites to browse for cheap costumes.