I don't mind paying that much for DS outfits. My daughter goes trick-or-treating 2 or 3 days at different places. She also goes to a fair that has a contest and last year she took 1st place as most beautiful as tinkerbell, which to me is priceless.
When were done for the year, I resell them on ebay. You can make 1/2, if not all of your money back since they are DS. One year, I even got more on ebay than what I paid for the outfit.
I had a scooby costume one year that I paid $20 and only made $5. I buy DS outfits for $34 ($24 with coupon and $25 for accessories) and get around $35-40 (sometimes more) for set on ebay, not inclluding the wand since I let DD keep it. You do the math...totally worth it to me.