A new Seattle-based startup is offering a way to sell stuff with an app, sparing you the pains of meeting that crazy cat lady via Craigslist or eBay. OfferUp launched a new free app for iPhones today, allowing users to click pics and list what they want to sell, all in under a minute.

OfferUp also contends that another advantage it has over other online marketplaces is safety. The company claims that it will keep the creepy Craigslisters at bay by using a program called “TruYou,” which can help verify identities by including scans of driver’s licenses. All back-and-forth messaging is also kept anonymous and within the app until buyers and sellers are prepared to share info, allowing them to keep personal e-mail addresses private.

Items are listed in several categories including baby and kids, clothing and shoes, electronics, sports and outdoors, and more. The seller can “snap and tap” the item they want to sell, and it posts immediately to OfferUp’s mobile marketplace and website. The pics are clearly shown with price and the seller’s general locale, like Renton or Woodinville, for easy browsing.

The listings can also go to users’ Facebook, Twitter and/or Pinterest pages, or in an e-mail to individuals or groups. It also informs the seller of how quickly buyers respond to their posting, so you know how fast merch is moving. The users then mutually agree on how they will exchange goods.

OfferUp is the brainchild of CEO and founder Nick Huzar, who was inspired by a look around his home after the birth of his daughter. The former DealSpringer CEO and T-Mobile product manager said that he “soon discovered that many items had to come and go into our home, or else we’d wind up on a TV episode of Hoarders.” His company cites a 2011 study from the NPD Group, a consumer and retail information source, that reports that the average U.S. household has more than $7,000 in unused items.

The company plans to host a citywide “Flash Mob” garage sale in Seattle and Bellevue on July 21. Users can list an unlimited number of items on OfferUp for free and have buyers pick up their goods at the garage sale, location TBD.

There is also a special link for consignment shops, and you can find OfferUp on Facebook and Twitter.

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