The location in Quanzhou with the highest real estate prices is typically the city center, particularly around the area known as the "Old Town." This region has seen significant development and investment due to its historical significance, proximity to major infrastructure, and the presence of key commercial and cultural landmarks.

The high real estate prices in the city center of Quanzhou can be attributed to several factors. Firstly, the Old Town is a UNESCO World Heritage site, which attracts both domestic and international tourists, boosting the local economy and increasing demand for property. The area is rich in history, with well-preserved ancient architecture and cultural heritage, which adds to its appeal.

Secondly, the city center is well-connected to other parts of Quanzhou and beyond, thanks to its proximity to the Quanzhou Port, one of the busiest ports in China. This strategic location has made the city a hub for trade and commerce, further driving up property values.

According to data from the Quanzhou Real Estate Association, the average price per square meter in the city center is approximately 10,000-12,000 RMB, which is significantly higher than the city's average of around 6,000-7,000 RMB. This disparity is largely due to the limited land availability in the city center, which has led to increased competition among buyers and developers.

Moreover, the city center is home to many high-end residential complexes, luxury hotels, and office buildings, which have contributed to the upscale image of the area. The presence of these amenities has also attracted a wealthier demographic, further driving up property prices.

In conclusion, the city center of Quanzhou, especially the Old Town area, has the highest real estate prices due to its historical significance, strategic location, and the presence of key commercial and cultural landmarks. The data from the Quanzhou Real Estate Association supports this trend, with the city center averaging significantly higher prices than other areas in the city.