From their Facebook page:
Join our 35 Years Birthday Celebrations over the next weeks.
Here is our first present to start off the celebrations:
Walk into any of our 2nds World stores until 13th August and receive a $25* 2nds World voucher with no minimum spend!
Limit of 1 voucher per household and transaction. Voucher expires 31. August 2013. Not redeemable for cash and no change will be given.
Voucher can only be used in store. Valid on ticketed prices only. No further discounts apply. Discount amount includes GST and is not valid with any other offer.
Link to Facebook page https://www.facebook.com/2ndsworld?hc_location=stream
[EDIT]
Below are some good bargains from their online shop, but not sure the availability in each store so might as well call your nearest store first
Samsung Bluray Player Series 5 for $24 (props to easternculture)
http://www.2ndsworld.com.au/samsung-blu-ray-player-series-5-…
Akai DVD Player (Free)
http://www.2ndsworld.com.au/tv-audio-accessories/media-playe…
Altech HD Set Top Box (Free)
http://www.2ndsworld.com.au/tv-audio-accessories/media-playe…
I hope they dont markup the prices to compensate for this offer