It seems that Airbnb has a major bug. Whenever I try to book a place in US from India (using the airbnb.co.in site), it shows me prices in INR (Indian Rupees). However I have a US credit card and when I convert the currency to USD, it does stupid double currency conversion (USD to INR and INR to USD again).
E.g., a 95$ property on the booking page becomes 105$ in the payment page. Please see the attached screenshot for reference.