The directory keeps this file because dealer pricing follows the auction calendar. Copart and IAA sell weekly per yard — those results set the floor for rebuilt-title retail. Manheim's dealer-only sale weeks set trade values for clean-title stock; when a big sale week clears, expect your local independents to re-price within days.
Reader application: time your negotiation right after a heavy sale week in your segment, and bring the reported numbers. A dealer who just watched comps soften has a reason to move.