Children (7 - 17 y.o.)/students get 30 USD off the tour price. Students must have an ISIC card, otherwise the discount is not available.
Gratuities to the guide and driver are not included in the tour price. The sum you wish to give to your guide and driver after a well-done tour should be up to the western standards (approximately 15%). It is a good idea to divide gratuity between your guide and driver and give it separately to them: 10% to the guide and 5% to the driver. Please have some cash with you (USD, EUR or RUB) for this reason, but it is always up to you!