If you live in a major metropolitan city like we do, you may have trouble scoring a piece from the awesome limited-edition designer collaborations that are popping up everywhere these days. Whether it’s designer shoes, accessories, or clothing that the country’s biggest retailers are selling, the products are in high demand. The minute the collections go on sale, the stores are flooded with thrifty (and aggressive) fashionistas and it’s hard to get in the door, much less a piece of the collection. Thankfully, we don’t have to feel bad about not having gone to the midnight Zac Posen x Target shopping spree — we can score tons of the pieces on eBay and pretend we were there.[ITPGallery]