Everytime I have bought one.
The sales tax on new cars, motor homes and pick-up trucks in Mississippi is 5%. Used sales tax for vehicles under 10,000 pounds is 3%
Private sales of used cars pay only the PST. Used cars bought from Dealers pay both PST/GST (the dealers are providing a service - go figure).
Depending where the car is purchased and registered. Cities, counties have different tax bases. If you purchase a car in Tracy (8.750%) or Tahoe City (8.250%) and registered the car in Pleasanton...
The sales tax is around 98% per penny , so otherwords for every penny you must pay $400000.