Prices for excursions are more expensive than for representatives of other countries. For example, an excursion to the Sahara for 2 days costs 210 dinars for us, and 190 dinars for others. Yes, this is the only excursion to the cat. you should go, well, maybe even a crocodile farm, on your own by taxi, according to the taximeter 2 dinars!
It is more profitable to take euros, not dollars. At the time of my stay, 1 dinar = 21 rubles.
Buy everything in stores with fixed prices, otherwise you will overpay STRONGLY!
Have a good rest!