Light Aircraft Association

Does anybody know what the legal liability is for a constructor who sells his aircraft? Is it indefinite or does buyer beware apply? I would be grateful to hear others opinions.
SJG

I would like to contact a George Harris (or Harrison) who visited my mother's house a couple of years ago he left his telephone number but I have subsequently lost it. If anybody knows him I would appreciate it if we could be put in contact .
Thank you