Plain black long sleeve shirt and red skirt were purchased from The Mogan eBay Store (both under $10): http://stores.ebay.com/TheMOGAN-Clothing
The faux red leather harness/belt was purchased from eBay but I don't remember where. It was under $10 though.
Black winter tights were purchased from Marshall's but I don't remember what brand they are and they don't have tags (under $5). They are warm and super soft (I think microfiber) on the inside so even if you skip a few days of shaving, these won't make you itch! Love them!
Boots are Doc Martens: http://www.dmusastore.com/p-3833-leanne.aspx They are pricey but I waited until the site was having a sale and saved up some moolah before I bothered purchasing them. I think I got them 25% off. Maybe 30%. They are super comfy for wearing a long time and even dancing!