BargainAndHaggle.com said Jupiter Media Metrix rated it the second most-popular pure consumer-to-consumer marketplace, trailing only eBay in number of unique visitors. BargainAndHaggle.com is an online marketplace that allows consumers to negotiate one-on-one to buy and sell items ranging from consumer electronics to sports memorabilia, antiques and collectibles. Grand Rapids, Mich.-based mindpepper LLC, the Internet product development company that launched BargainAndHaggle.com, said the June rankings indicated the online trading marketplace had over 2.4 million unique visitors last month. mindpepper LLC is a wholly owned subsidiary of Chicago-based BDO Seidman, LLP, a professional service organizations. Since launching BargainAndHaggle.com earlier this year, mindpepper has seen the number of registered users and sales for the online trading marketplace more than double every month, it said.