Retrieving the price from Apple is quite easy as it is already included in the SKProduct object.
To get the price in local currency I use this code:
Code:
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setFormatterBehavior:NSNumberFormatterBehavior10_4];
[numberFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
[numberFormatter setLocale:product.priceLocale];
NSString *stringPrice = [numberFormatter stringFromNumber:product.price];
[numberFormatter release];