6,500 People Have Signed Up To Buy A Leather Tote Bag From Fashion Startup Everlane

The "Petra" collection, at $325 for the smallest bag and $425 for the largest, are some of the most expensive products Everlane has ever sold. The e-retailer focuses on basics - mainly tees, button-down shirts and sweaters - that all cost under $100.

"Some things are worth paying for," Everlane says in an ad for the collection. "We went to Italy to create the perfect bag."

The company only manufactured 1,000 bags, but it's planning to roll out more in 2014 due to the unexpected demand, Everlane spokeswoman Li Jing told Business Insider.

The bags are part of Everlane's foray into luxury products, which it has branded "Everlane Black." Upcoming additions to the "Black" collection include cashmere sweaters and scarves priced between $120 and $250.

Everlane markets itself as keeping costs low by cutting out the "middle man" and going directly to the factories that manufacture designer labels. The company also reveals its markups to consumers.