The main claim is strongly supported by the primary Cox Automotive page "Manheim Used Vehicle Value Index: March 2026 Trends," which explicitly says non-adjusted wholesale used-vehicle prices were up 4.2% against February and 5.7% year over year in March. That same source says the EV Index was up 7.9% year over year, which is essentially consistent with the user's 8.0% figure if rounded. The Cox Automotive press release "Manheim Used Vehicle Value Index Increases Through Q1, As Healthy Spring Bounce Pushes Used-Vehicle Values Higher" further confirms a sharp March increase, though using seasonally adjusted measures. The secondary article "Used Vehicle Wholesale Prices Jumped. That's How it Started in 2020 when Broad Inflation Took Off" repeats the 4.2%, 5.7%, and 8.0% figures. Because the primary source gives 7.9% rather than exactly 8.0%, the statement is best assessed as likely true rather than perfectly exact.