I can't quite figure out what the average transaction price measure KBB is using here is. going by their tables by category (for example, an average of $26,379 for compacts)[1] and that the price is now below sticker[2], it looks like they're not using the OTD/TTL cost and just the portion related to the vehicle.
[1]https://www.coxautoinc.com/wp-content/uploads/2023/04/March-...
[2]https://mediaroom.kbb.com/2023-04-11-After-Nearly-Two-Years,...