I can confirm that sell prices are lower than buy prices and that prices change, no screen shots but have been scribbling notes to keep track.
I usually use: https://docs.google.com/spreadsheets/d/1VWWsl8RO8ZHobHHS6RAktZxeL9xwU6F53QzlCjd5wok/edit#gid=0
It is updated by players that view it, as comments. Those comments are updated by the owner of the spreadsheet. But it is more dynamic, seems updated to be pretty close to what you will find with market fluctuations. Anyone can add comments, which helps.
It is updated by players that view it, as comments. Those comments are updated by the owner of the spreadsheet. But it is more dynamic, seems updated to be pretty close to what you will find with market fluctuations. Anyone can add comments, which helps.