Amazon.com is in talks to acquire online luxury retailer Net-a-porter in what could be the biggest purchase for the e-commerce giant. The potential deal could value Net-a-Porter at under the $2.6 billion reported by the fashion industry trade journal according to Forbes. Amazon.com has long been looking to strike a deal in the high-end fashion retail sector. Any deal with Net-a-Porter would commit the company in an area it lacks strong presence and experience in. Richemont, a luxury goods group, bought Net-a-Porter for 392 million euros in 2010.