The sad reality is that someone just tried to scam me in a sale.
An online local seller posted a Nikon D5300 camera with an 18-140m lens and claimed he only used it 10 times. As I was looking to upgrade from my D5100, I answered the ad. Just to be on the safe side, I asked him to send me an unmodified picture, which I assumed he did. I then attempted to upload the pic on the various shutter count and Exif sites. While the sites recognized that the pic came from a Nikon D5300, I was unable to get the shutter count from the pic he sent me. What's bizarre is that I was able to get all sorts of other info about the image from those sites too but the shutter count entry was strangely missing. I couldn't explain the "why" of that. To make a long story short, it seems the seller tinkered with the image file just enough where we could still see all sorts of info on Opanda and other exif programs but with the exception of the shutter count. Apparently, there is a way.
When I first googled "difficulty getting shutter count with D5300" issue, it seemed like a number of other people were experiencing the same problem. Was this legit, I wondered?
Stll, I couldn't shake my tingling spidey sense. Why would Nikon overlook something as important as this? They wouldn't right? lf there truly was a rampant problem with this, we'd see more complaints. So, prompted further by the puzzled reactions of members here who weren't experiencing this problem, I asked the seller again to send me another JPG and NEF and insisted that it be completely unmodified, i.e., don't even rename the file (I began to suspect he wasn't being forthcoming). All this to say, I quickly discovered that Mr. "I only used this camera 10 times" was actually selling a camera with shutter count of over 7000. While this isn't necessarily a huge number, I didn't appreciate being lied to. I didn't bother with this seller after that.
While I never would have purchased the camera without knowing the shutter count anyway, it was nonetheless reassuring to see all of you also suspecting that something was off here.