The online booking price was 248 USD, but the actual payment was 521.96 USD, such a large difference feels like a trap. The GPS fee was 119.92 USD, and there were other insurance charges. Due to poor language skills, I couldn't understand why. Could it be that the original reservation didn't include any insurance? At the counter, they even mentioned the total rental cost would be over 600 USD. It seemed suspicious so I refused. Please provide honest service and explain everything upfront, especially for people who aren't proficient in English.