Carvana shares fell 1.8% to $389.39 Thursday afternoon after the company reported record first-quarter sales and profit but a decline in gross profit per vehicle. Carvana sold 187,393 retail vehicles, up 40%, with revenue rising 52% to $6.43 billion and net income reaching $405 million. Gross profit per retail unit dropped to $6,783 from $6,938 a year earlier. Wall Street analysts raised price targets despite margin pressure.