For older, collectable, antique & unusual items. We have looked at [original link] and it seems that Camden Passage, Spitalfields, Bermondsey Market, Piccadilly Market & Gray's Antique Market might be possibilities. Looking for all comments and sometimes Car Boot sales can even be better, is there a good web site that lists Car Boot sales? Hopefully something NOT as busy as Portobello Rd. is on a Saturday. Thank you all.
Here is a site that lists car boot sales, and if you enter London you will find 72 that are listed, but unfortunately most are taking place only at the weekend. There are a few listed for weekdays but i am not familiar with any of them. It is not uncommon for dealers and collectors to pay extra to get in early so the real good stuff will be purchased before most of the general public arrive.
Another alternative would be Church Street Market near Edgware Road Tube station. One end is local food and veg (and cheap rubbish!) but the other (eastern) end has antique shops and good quality second-hand stuff. The most famous place is Alfie's - one of those places you never know what you'll find, from kitsch and tatty to rather gorgeous! Check it out here: [original link]
I love [original VT link]
but for cheap stuff better go to Camden.
I would recommend Camden Passage which is confusingly not in Camden but in Islington! It is jam packed with the type of places you are looking for.
Another good antique place, although maybe not quite what you are looking for as it tends to be art and furniture mostly and it is also very expensive. If you visit Portobello, it is walking distance from there which is handy.
Hope this assists.