Amazon is reportedly considering what might be its biggest acquisition yet - a purchase of online luxury retailer Net-a-Porter. But Forbes says negotiations are still in the early stages and could fall apart. The deal first reportedly valued Net-a-Porter at $2.16 billion. But, citing a person familiar with the situation, Forbes says the deal could value Net-a-Porter lower than that. Amazon has long eyed the high-end fashion retail sector where the e-commerce giant lacks a foothold. Just last year, Amazon was reportedly in talks to buy Indian fashion retailer Jabong.com for $1.2 billion but nothing panned out there. Net-a-Porter is owned by luxury goods group Richemont - which bought Net-a-Porter in 2010. A spokeswoman for Net-a-Porter said the company does not comment on industry speculation. Shares of Amazon are trading closer to their 52-week high than the low.