Carvana shares plunged 8.3% in premarket trading Thursday after the used-car retailer reported lower gross profit per vehicle and shrinking wholesale volumes for the latest quarter.

The Tempe, Arizona-based company made $359 million in adjusted earnings before interest, taxes, depreciation and amortization in the three months ended Dec. 31, above both analysts’ expectations for $330 million and the $60 million it earned a year ago. Revenue came to $3.5 billion, according to a statement released Wednesday, surpassing consensus estimates for $3.3 billion.

While Carvana projected stronger sales volumes and adjusted earnings for this year, it showed signs of weakness at both the retail and wholesale levels that could presage lower-margin growth.

Revenue per vehicle fell by $1,000 a car to just over $22,000 in the latest quarter, pushing down retail gross profit per unit by $270 to $3,226. At the wholesale level, gross profit per vehicle came to $674 — missing analysts’ forecast for $714 and below the previous quarter’s $930. Wholesale volumes undershot the consensus outlook by 3,248 vehicles.

Carvana posted earnings per share of 56 cents for the latest quarter, above analysts consensus forecast for adjusted EPS of 32 cents and unadjusted of 31 cents.