QANTAS
Purchase your choice of ASPAR products valued at over $50 from aspar.com.au or auroraspa.com.au, and receive an ASPAR product to the same or lesser value (may exclude some products, the item of the lowest value will be the complimentary product).
Free shipping is provided (minimum $50 spend, which is what you need to spend nevertheless to qualify to use the voucher).
I've done further analysis of the deal here:
http://www.savtravv.com/blog/2015/12/12/aspar-aurora-spa-rit…
(Note that there are no affiliate or referral links on that page).