Shaded band is the 25th–75th percentile of asking prices. This tracks
what is on the market, so it moves when listings arrive or sell as
well as when prices change — watch the listing count below alongside it.
The headline figure above instead compares each listing against itself.
Everything left of the dashed line (16 days) is reconstructed
from listing price history — it only includes cars still listed today, so
anything that already sold is missing from it.