Unsure of how many will find this useful! My United 2011 SU1 was stolen so I started to look for a replacement. I'm sure it's no surprise the retailers are charging insane amounts, so I looked at websites in EU/UK and the US.
Found this website, even with the 90 pound shipping (included in above price) you are saving roughly $300 if you bought from Australia. Other bikes include WTP Zodiac and the Volta which are also $300 - $400 cheaper than buying in Aus. It appears there's a massive sale, you can get mid range decent brands for under $400 delivered, saving hundreds.
Hopefully this helps someone who may be interested :D
EDIT: EVEN CHEAPER! The VAT is automatically removed, saving roughly 20% ontop of the existing sale price.
+1 because BMX is awesome and this seems like a good price.