Trade Me said that the ban "feels like the right thing to do" and that the company consulted experts including advocacy groups and the Department of Conservation in making their decision.
The company also read the recent decision of the Foreign Affairs, Defence and Trade Select Committee that recommended a resumption of the 1989 international ivory trade ban.
The select committee decision was the result of a petition led by Auckland school teacher Virginia Woolf, which called for a complete ivory trade ban in New Zealand.
Ms Woolf said she was "greatly heartened" by Trade Me's decision, and that she was "encouraged that they are acting responsibly and helping to close the loopholes in New Zealand's domestic ivory trade".
These sentiments were echoed by Sir Stephen Tindall, who along with Mr Kerridge had signed an open letter to the government calling for an ivory trading ban.
"Trade Me should be commended for its decision to ban ivory sales," he said. "They are setting an excellent precedent for other New Zealand trading houses to follow suit."
Other agencies allowing ivory trading in New Zealand include antique shops and auction houses. Webb's Auction House reported in 2012 that the market for ivory continued to boom, with competition driving prices well in excess of estimates. Webb's Auction House's top 10 highlights for 2013 included a pair of nineteenth century rhinoceros horns, sold for $797,300, a single rhinoceros horn, which achieved $86,770, and a rhino horn walking stick, which sold for $19,930.
Webb's Auction House noted that the rhinoceros horn artifacts are highly sought-after by the domestic Chinese market and that the interior decorative arts department has seen a considerable rise in new patronage from local Chinese collectors.
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