From finding the finishing touches to statement pieces that inspire entire character ideas, the possibilities are endless when it comes to styling secondhand finds for costumes. To get the inside scoop on how to curate the perfect Halloween costume, we spoke with a thrifting expert. Here, we share her insight on what to look for while shopping, costume inspiration, and more for creating the perfect secondhand Halloween costumes. Sydney Muñoz, sustainability manager at Goodwill Industries InternationalChoose the Foundation of the CostumeWhen thrift shopping for a Halloween costume, the first step is having an idea of what you want to be. Here are some key elements she suggests keeping in mind when putting your Halloween costume together.