I just bought two from Indooroopilly store. I'm posting in my car so sorry can't give you very detailed info. I've been searching for a wireless headphones for a while and this model got quite good feedback. It's closed, with 80m range (i will be able to listen to my tv while walking my dog around my house lol)
The cheapest online is $300+ in Australia, and it will cost similar if you buy from US or UK, and $320+ in China
Heading to DFO now, can upload a better version of receipt later if you need it.
EDIT: Invoice uploaded, please let me know if you need scanned copy
http://upload.ozbargain.com/2010/12/28/5093_dsc_0360.jpg
HN Indooroopilly store had at least 20 in stock when I was there, checked with the staff, was told there is no expire date for this deal, until all sold out.
Cheers buddy!