I do not have access to real-time prices of goods and services. However, based on general information, the cost of GS Travertine from Iran can vary depending on factors such as quality, size, and quantity. Generally, travertine is considered a mid-priced natural stone compared to other stones like marble and granite. Its exact price and affordability can vary depending on the budget and preferences of the buyer. Its advisable to consult with a stone supplier or specialist for specific cost estimates.