Jack Daniels or if I'm feeling a bit richer I'll go for a bottle of Woodford Reserve.
Seems we have a few piss heads round these parts. I believe it was Jaron that first put me on to this site below, but in case it was someone else, thank you mystery WRXer (although I prefered the previous version)
www.boozle.com.au
Search by wine/beer/spirit/brand/whatever and it'll tell you the cheapest place it can be purchased in your area!