Airport prices sky-high  By Alice Neville  Things are more
expensive at airport stores - a packet of Tim Tam biscuits could
set you back $8.99. Photo / Supplied  The price of air travel
may be coming down - but you could be paying extra for snacks or
essentials at the airport before your flight.  Some items on
sale at Auckland Airport cost more than double their price at
the nearby Airport Shopping Centre, and the situation is similar
at other major airports.  A 600ml Coke will set you back $4.99
at Whitcoulls stores in Auckland's domestic and international
terminals and at Wellington and Christchurch Airports.  At the
Countdown supermarket down the road from Auckland Airport the
same item costs just $2.78 - about 45 per cent cheaper.  A 750ml
bottle of Pump water costs $4.99 at the News Travels store in
the Auckland domestic terminal, almost double the Warehouse
price of $2.59 and much higher than what you'll pay at Shortland
Superette in central Auckland - $3.40.  If you're feeling
peckish, don't go for a p