International 505s tend to be sold through purpose specific sites. These visual aids help summarise the information found on the site.
A plot showing the various prices of boats from http://www.usa505.org/classifieds (last updated June 7, 2018). Listing categories organize boats into 5 levels of typical boat description and price points.
The same plot showing a smoothing line to help see patterns of over / under priced boats.
