They are not "required" to anything to the car. This is true in most locations. In some states they must do a basic safety inspection, so tires and brakes have to be legal and lights have to work, etc. Check with your state's DMV or Bureau of Consumer Affairs to learn whether your state has any requirements the dealer must fulfill.
California, for example, has few such requirements but it allows a used car to be sold as 'certified' if it meets a specific list of quality standards. If the car isn't certified you are allowed to ask why it is not.
When a used vehicle is sold in California, the seller is legally responsible for making sure that the vehicle's emission (smog) control equipment complies with state requirements. There is no provision in the law allowing a seller to sell a vehicle "as is." (Calif. DMV)
There are dealers that only sale used rv's.
There are a few Canadian auto dealers that have used Jeeps for sale. Some of the those dealers include 'Riverside Auto Sales' in Ontario and the 'Canadian Auto Mall' also in Ontario.
BMW car dealers do generally offer cars for sale though they are required to have a wholly separate area for their used car sales than for new car sales.
Yes, there are used volkswagen for sale in Japan. Their are actually dealers that strictly deal with selling used cars out of that country as well as others.
No
2001 Toyota Corollas are found for sale in publications such as Auto Trader, at Toyota used car dealers, and at major used car dealers such as CarMax.
Used Porsche cars can be found for sale in newspapers, the internet and even Craig's List. Imported car dealers may have the largest selection of used Porche cars for sale.
Saturn car dealers are based throughout the United States. Their website offers a dealer search to find the closest Saturn dealer. If there are no local Saturn dealers, other dealers may offer used Saturns for sale.
The best way to find local used car dealers is to look in the back of your local newspaper or free magazines. There will usually be a section where people advertise things they have for sale.
The best place to find a used Seat Leon for sale is at your nearest Seat dealership. Their website and that of other Seat and used car dealers are also a good place to check for what is currently available for sale.
One can find listings for a used 1963 Chevy Impala online at eBay, Oodle, and Cars For Sale. One can also check with local Chevrolet dealers or local car dealers to see if there is one for sale locally.
Many new and used car dealers have web pages where one could search and find a Ford F350 4x4 online for sale. There are also sites which compile list of cars for sale and have them on a central page from many different dealers.