Second Hand Evening Dress selling for special purpose - $17000 (Taipei)

I would like to sell my dress for a special purpose on a non-profit work we do in Taiwan.
Pre-owned used only once Exclusive Handmade Galluzzi e Gini Evening Dress Floral Tule Cipria. Made in Italy. Size around 16 USA (pls contact for precise measurements)
Galluzzi and Gini are Italians dressmakers also famous for tailoring misses’s dresses in Cape Town. Thank you.
Price in Italy: 21000NT (600 euro). Selling for 17000 and opened to offerings