Currency in South Georgia and the South Sandwich Islands British pound (GBP £). For 10 US dollars you can get 7.95 British pounds. For 100 US dollars you can get 79.5 British pounds. And the other way around: For 10 British pounds you can get 12.6 US dollars.
Prices:
When you're thinking about traveling and it doesn't necessarily have to be a specific country, maybe the costs will be lower than in South Georgia and the South Sandwich Islands in one of the nearby countries? Check prices in: Falkland Islands, Argentina, Uruguay, Montenegro, and Chile.