Black Book’s Ricky Beggs has been reporting on a surprising trend out in the market – yes, gasoline prices continue to fall, but, no, used vehicle prices for fuel-efficient vehicles are not following right behind as they usually do. Entry midsize cars, compact cars, and upper midsize cars have been seeing strong price retention at auction for the past three months, Beggs says. Gasoline prices fell another six cents last week and the national average has dropped to $3.37; so far, it’s not negatively affecting these segments at auctions.