if it is a sample machine, its warranty period will not be the day you bought it, and there will be some problems in the warranty. Moreover, the sample machine will be more or less worn out in appearance, and generally there will be no major problems in the internal hardware. I don't know if the place you are going to is normal. It is also possible to use second-hand goods to fill the sample machine. Before buying, you should familiarize yourself with the detailed configuration of the computer you want to buy, such as CPU, memory, graphics card, motherboard and hard disk signals, and then compare it with the real machine. It is best to bring a USB flash drive, install some software like Master Lu, and look at the service time of the computer hard disk. If it is used for a long time, it means it may be second-hand, and there is a notebook. To be on the safe side, it is recommended to find an expert to accompany you.