Why Can't I Trade Yellow Gathere's Scrips?

[Pintsized]

Having got botany up to the mid 70s I've accumulated 1434 Yellow Gatherer's Scrips and I'm supposed to be able to trade them to a Scrip Exchange .. so why, when I do this with the Scrip Exchange NPC in the Crystarium and Eulmore, does she refuse to take them:

"Scrip Exchange: I regret to inform you that we are not looking for new suppliers for the time being. However, should there be a change of circumstances, we may have reason to call on your services."

According to one wiki: "The Scrip Exchange, who sits next to the Collectable Appraiser, will accept your scrips and offer gatherer and crafter gear,"

So how/where do I trade them if not with an NPC called "Scrip Exchange"?