Provide a "High/Low watermark" reference with the price
(imported from GetSatisfaction)
It would be very useful if you could provide some insight on when to buy or not a book. I think the best way is to provide historical high and low prices with date.
Now, it would be awesome if you could also provide a chart with the prices history.
I’ve added a sparkline graphic to show recent changes. The full chart and high/lows is still on the todo list.