Several colors are chosen for Soft Calf line every season. Amethyst & Emerald are previously released colors that are making a comeback for Fall 2006, however, Elise/Sophia/Stella are not being made anymore (this season at least). If a seller claims that their Emerald Elise is from Fall 2006, it's definitely fake (or the seller doesn't know what he/she's talking about).
(Emerald & Amethyst of previous seasons)
I know that Blake came in Emerald, therefore, there's a possibility that Elise was available in Emerald as welll. I suggest calling a MJ boutique to confirm that Elise was released during the season of Emerald. While calling Marc Jacobs boutiques recently, I was told by a SA that her store has Elise in Amethyst.