I came across this display unit E-m10 today, it's good and clean condition with a few light marks and only 2500 shutter actuations. For 250usd - 190 minus what I would get for the lens, and a full years Olympus warranty it's something that I am considering. Everything seems good but there is this mark on the sensor or the protective glass in front of the sensor that I'm having trouble identifying. There are little spots that I'm sure will rub off but there is this one large mark that won't come off so easily. The guy at the store tried to gently nudge it out with a lenspen but it seemed stuck in place. I'm not sure if it's some type of dirt stuck in place or it could be an actual scratch on the filter or the protective glass in front of the filter (I don't know if it's the same as the E-m5 that way). The warranty is good for electronics or any shutter/button/lcd issues but it doesn't cover damage like this. I know it's hard to tell from pics but any input I get would help. Thanks. Closeups, the circled red mark is the main thing I could not identify as dirt or an actual scratch.