Cant buy wasabi Mango UHD420

I really want to get the UHD 420 but I cant find it anywhere. I have found the UHD 400 is it good as well? I would like the Freesync support from the 420. I would like to use this for gaming, I am from Australia so if you find any ways to buy it, it has to ship there.
+UHD 400: http://www.ebay.com/itm/WASABI-MANGO-40-UHD400-REAK-4K-HDMI-2-0-DP1-2-3840X2160-LED-Monitor-/222028286408?hash=item33b1eac9c8