4楼、8楼、18楼不能买？其实真正不能买是这4个楼层，不是迷信！

Group 1 - The core viewpoint emphasizes the importance of careful consideration when purchasing a home in China's expensive real estate market, highlighting that various factors such as floor type, location, and surrounding amenities significantly influence buyer decisions [1] Group 2 - The top floor offers advantages like privacy and good views but has significant drawbacks including poor insulation leading to high electricity costs and potential water leakage issues [2] - The first floor is convenient for elderly residents and often comes with added features like small gardens, but it suffers from low privacy, noise pollution, and moisture problems [4] - The second floor inherits many issues from the first floor, such as noise and ventilation problems, and also faces unique challenges like sewage backflow and limited drying space for laundry [6] - The waistline floor, often overlooked, has insufficient lighting and ventilation, lacks clear pricing advantages, and shares noise and privacy issues similar to lower floors, resulting in poor cost-effectiveness [8]