Similar to the deal posted by TRENT86, Kmart is also selling the guinness book of records for $15. I checked Burwood a day ago and they had about 10-15 books in stock. States $20 on the website but but it should scan as $15 in-store.
EDIT: Thanks Lane Myer and cooperdog, appears to be nationwide (confirmed in QLD and VIC)
Do they get the Guinness World Record for the least useful book each year? I mean, seriously, isn't this the same cover as the last few years??