My shutter has started making a scratchy sound, kind of like rusty scissors, every time it opens and closes. It's clearly abnormal and louder than the usual clicking sound that it normally makes. I've attached a recording of this sound. I thought I might somehow have gotten sand inside the camera body, but testing the shutter with no lens, all appears normal, except for the sound it makes. Also it sounds very slow, considering the speed of the shutter. The recording I made is from a 1 second exposure. The sensor is nice and clean and the camera seems to work fine otherwise, the pictures appear normal, but I'm still worried. I want to take it in to the shop for a repair, but considering I have to pay just for an estimate, it's really not reassuring (am I the only one who has something against paying to find out how much I have to pay?) I'm planning on an upgrade this summer, so I might just keep using it as is and replace it entirely if/when it dies.