These titles stem from the old English feudal system. A Lord of the Manor was historically the owner of a specific piece of land and held rights over it.

Here is a comprehensive essay outlining the legalities, methods, and realities of buying a British title. The Pursuit of Prestige: Buying a Lord Title in the UK

Therefore, any website claiming to sell you a seat in the House of Lords or a place in the official British peerage is fraudulent.

The most important distinction to make is that official British peerages—such as Duke, Marquess, Earl, Viscount, and Baron—cannot be legally purchased.