Will she nab a coveted spot among the first 100 registrants for the BlizzCon costume contest? So, video game costumes any WoW Insider readers planning to cosplay at BlizzCon 2013? Costumes for cosplay ranges from $10 to hundreds of dollars, resident evil costume depending on the creator and fabric. Costumes for cosplay are usually made by specialist companies. You might be thinking about buying a costume to cosplay but how do you find the right one?