Adding another one here for reference, these guys will negotiate and go higher than their initial online offer as others have experienced.
2021 Highlander XSE
Carmax $47,000
Shift $45,100
Carvana - lowball, can’t remember
Autonation online offer $45,750
Was gonna just drop it off at carmax this week but Autonation reached out to me and was desperate for me to bring it in, asked me what I wanted so I said $48k.
Brought it in the same day, after checking it out they gave the full $48k!
MSRP was $47k and I got it at almost 10% off lol