@Werehamster
I can't find what you are linking to *@SirensofTitan* but of course you can sell any old rust bucket, as long as you are clear it's a rust bucket. People often sell cars for scrap.
Yes,*@Werehamster*, you are right as long as it's correctly described.
Here is the text from the AA site
Buying a used car privately
You won't have the same legal protection as you would if buying from a dealer
It's up to you to ask the right questions and inspect the car thoroughly before you buy.
It's a good idea to get a thorough car check to make sure there's no shady past.
Because your legal rights are more limited, unscrupulous dealers may masquerade as private sellers:
Be very wary if a private seller wants to meet you somewhere other than at their home, or if their name is not on the V5C registration document.
A dealer pretending to be a private seller is committing a criminal offence.
The only legal terms that cover a private sale contract are:
The seller must have the right to sell the car.
The vehicle should match the description given by the seller.
The car must be roadworthy – it is a criminal offence to sell an unroadworthy car and an MOT certificate from a test several months ago is no guarantee that the car is roadworthy today.