Highly recommended German/European style strategy board games. Settlers of Catan and Carcassonne have won plenty of awards and are a great balance of skill, luck, negotiating etc..
Just had this delivered:
Settlers of Catan 5 6 player expansion $24.99 (I already had the base game)
Carcassone base game $32.99
Delivered next day in Sydney. Not an awesome bargain, but the cheapest I could find online after a quick search.