Hey Simon,
I am a long time user of Aux and really appreciate all of your work! I remember at one point you had a feature which showed the number of times you had seen an item in scans on the tooltip. I thought that this was very useful for gauging the integrity of price data, especially for rarer items. Are there any plans to add an option for this back in?

No, it's not even possible to give an accurate number because auctions don't have a unique identifier, nor would it make sense with the current history which uses a median of daily minimum buyouts and it would give you a false security in many cases.