All three majors publish calendars, and they rhyme: Copart yards run weekly online sales per location, IAA branches auction on fixed weekdays, and Manheim's big physical sales cluster into sale weeks — with the heavyweight lanes at locations like Manheim Pennsylvania drawing dealers from several states.
- Copart/IAA: check the location page, filter your lot's sale date, note the preview day.
- Manheim: dealer-only — private buyers see the results, not the lanes (see the access thread).
- End of quarter and post-holiday weeks run deepest inventory; late December runs thinnest.