This line chart displays the average sale price of items per year. The chart uses a white plotting area with black axes and a black line connecting data points. Built with D3.js, the visualization aggregates data by year using `rollup` and `mean`, then renders the series with `line`. It leverages the `@drbagwell/responsive-viz-axes` library for the axes and includes labeled x and y axes. Data points are marked with semi-transparent circles.