Well [USER=4532]@Todd Caputo[/USER] here is a list from 2019's Auto Remarketing's TOP 100 (volume 2018). These are the top 25 of the non-public (because most of the Top 100 are CarMax, Hertz, and Carvana... Google away my friend as I'm not sure if you are looking for Best Volume, Best Rated, Best Gross, etc. Maybe the question is what area of your business are you wanting to compare? Like my mom says, "Comparison is the thief of joy." 
DEALER CITY STATE TOTAL OFF LEASE ONLY ORLANDO ORLANDO FLA. 14,902
NORTHWEST MOTORSPORT PUYALLUP WASH. 12,260 ([USER=11446]@Collin Pedersen[/USER], isn't that you?)
OFF LEASE ONLY PALM SPRINGS PALM SPRINGS FLA. 11,303
OFF LEASE ONLY MIAMI OPA-LOCKA FLA. 9,839
TEXAS DIRECT AUTO STAFFORD STAFFORD TEXAS 8,773
STG AUTO GROUP MONTCLAIR CALIF. 7,754
OFF LEASE ONLY NORTH FORT LAUDERDALE NORTH FORT LAUDERDALE FLA. 7,107
DRIVERSSELECT GRAND PRAIRIE TEXAS 6,765
EASTERNS AUTOMOTIVE MARYLAND HYATTSVILLE MD. 5,252
THE SHARPEST RIDES ENGLEWOOD COLO. 5,114
EVO MOTORS - SEFFNER SEFFNER FLA. 4,572
ROBERTS AUTO SALES MODESTO CALIF. 4,463
CAR OUTLET CHICAGO ILL. 4,326
CALIFORNIA MOTORS DIRECT STANTON STANTON CALIF. 4,232
OC AUTO EXCHANGE FULLERTON CALIF. 4,099
FLORIDA FINE CARS - MIAMI MIAMI FLA. 3,337
SOUTHWEST MOTORS INC PUEBLO COLO. 3,299
DRIVERSSELECT GRAND PRAIRIE TEXAS 3,278
COAST TO COAST MOTORS HOUSTON TEXAS 3,192
AUCTION DIRECT USA RALEIGH N.C. 3,127
AUTOS OF DALLAS PLANO TEXAS 3,085
NORTH EAST AUTO CREDIT CLEVELAND OHIO 2,969
NEW WAVE AUTO SALES CLEARWATER FLA. 2,948
FLORIDA FINE CARS WEST PALM BEACH WEST PALM BEACH FLA. 2,846
PACIFIC AUTO CENTER FONTANA CALIF. 2,843