shares of carmax inc kmx jumped 83 toward a ninemonth high in premarket trading friday after the used car seller reported a big fiscal firstquarter profit beat as used consumer and dealer buys all improved net income for the quarter to may 31 fell to 1586 million or 144 a share from 2523 million or 156 a share in the yearago period the latest results include a benefit of 28 cents a share related to a legal settlement excluding that benefit eps was 116 well above the factset consensus of 79 cents total sales dropped 174 to 769 billion but was above the factset consensus 750 billion as used vehicle sales fell 144 to 600 billion while wholesale vehicle sales declined 285 to 151 billion the company said it believes inflationary pressures higher interest rates and tighter lending standards led to affordability challenges that continue to weigh on sales average selling prices for used vehicles fell 55 to 27258 the stock has run up 381 over the past three months through thursday while the sp 500 spx has gained 110