It's Gotta Go
An e-commerce marketplace where buyers and sellers can come together to find new, used, discontinued products, collectibles, antiques or services.
http://www.itsgottago.com/

Kill Fish - Auction Shop
Dedicated to anglers and outdoor oriented folks. Offering a secure safe way to sell their niche focused goods - mainly fishing and outdoors related products, items and services.
http://www.killfish.com/