This is a great point! While PG suggests that it's better to have a small number of rapid supporters than a large number of moderate supporters, it's important

This is a great point! While PG suggests that it's better to have a small number of rapid supporters than a large number of moderate supporters, it's important to find the maximum on the curve. The question is how many rapid supporters would you lose and gain by adding prices in more "accessible" locations? How less rabid would your users become by such a change? These are important questions that would need to be answered to gain market share. My gut is that the fact that you have to hover over the image to see the price is detracting. By comparison, you could show the price slightly more prominently, without having it be an eyesore (show in a light grey under the item picture, that maybe highlights to black when hovered over). This would, imo, make the price conscious happier, without getting in the way of design.