This image is taken from another forum:
It shows the frame with thumbnails, description and scroll buttons.
Its clean and useful.
Only problem I see are the trading sections because you can edit your gallery later on.
If you only say "item from picture #5 for 100fg" the poster could change his gallery, so you have to say what item or copy the image to your post.
On the other hand you can update your list of items that you sell and make a description like "starting at 50fg" "bin 50fg" or whatever
options (top right) include -view full resolution -download full resolution -view album on imgur
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