We joined a day tour with TES Tour (separate review) and Gobustan Rock Art was the first place we visited. We left Baku at around 10 am and arrived around 11 am. It was pretty crowded with a lot of visitors.
There was a small loop our guide took us through and pointed out the rock carvings / petroglyphs. We spent around 45 minutes here. The area is not too large but there were a lot of visitors.
We paid 10 AZN per person. We gave our guide the money and he bought the tickets. I'm not sure if they take credit cards.