SONY Cyber-shot DSC-RX100. I purchased this new 13 years ago. I used it regularly until around 2020. Since then, dust has gotten on the lens or sensor, and it now appears in photos like image 6, so I've stopped using it. The dust appears when the lens is stopped down to around f10; it probably doesn't appear up to around f4. Also, about once every few dozen times, the lens barrel doesn't retract when the power is turned off, and the photos taken at that time are not saved. Other than that, there were no particular problems. I thought it would be better to buy a new camera, so I've decided to sell this one.