Does Carvana lowball sellers to make more profit?

Carvana's offers are algorithmically generated based on market data and their margin targets. Whether a specific offer qualifies as a "lowball" depends on what competing buyers would pay for the same car. In some cases, Carvana's offer is competitive. In others, sellers find that CarMax, dealers, or broker services offer meaningfully more. The only way to know is to get at least one competing offer before accepting.