There are several London based shelters having cats for sale. Some examples include "CatChat", "CatCuddles", "Croydon Animal Samaritans" or "WoodGreen".
Pets for sale section in the newspapers, online, SPCA, and with people who breed cats.
I do not think a game will be for sale.
One could advertise a trampoline for sale in London through the "London Evening Standard" classifieds, Time Out London, This Is Local London, or Craigslist.
The Tower of London isn't for sale.
Breeding clubs dedicated to a specific breed of cat can be found world wide and as such Persian clubs are easily located for the purposes of tracking down a breeder who has cats for sale. Occasionally pet stores, on-line ads, classified sections in newspapers and animal shelters can yield results too.
Puppies are for sale in most animal shelters or animal/pet stores. You can also look in classified ads to see if there are any puppies for sale by individuals in your area.
trade me.
German Shepherds can be found at your local pet stores and shelters. Many shelters also have online websites that can tell you what kind of dogs are available to be sold.
It's not for sale.
One can find good rates on London flats from several UK based websites. Among the most trustworthy sites are Zoopla, Foxtons and Rightmove. Each of these websites offer both flats for sale and for rent.
The BEST car boot sale in London has to be BatterseaBoot on Sunday Afternoons. It's at Battersea Park School, Battersea Park Road, London SW11 5AP every Sunday, late start.
Why don't you just go to a local shelter? There are always pit bulls in shelters that need homes.