i really don't think ebay is using the camera info against us. unless the camera serial number is there in the properties. to check what info is stored on your image:
in windows
goto your pictures folder
right click on a photo
select properties
in the upper tab goto summary
click advanced.
there you will see all the info stored with the photo.
on mine it shows what model camera but not the serial number. they sold tons of that model camera so i am not worried at all
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