For the $5 auction note, the front and back images appear to be of two different notes. And that's an observation made without even taking into account that the front image appears to be a photograph and the back image appears to be a scan. From the front, the note appears badly trimmed, and by "badly", I mean the trim job at the top and bottom is obvious. From the back, the edges look natural and very straight where they are in view (the image is cropped a bit tight... another sign that the image is a scan). As well, there appears to be a tear in the top centre as seen from the front but not from the back.
I would not consider bidding under the circumstances. But because others might, Bob's advice makes sense. Get the seller to provide more images, front and back. There is nothing in the seller's selling history that suggests this is a simple mistake, i.e., mixing up of images from two different listings.