Cheap shopping / Flea Markets in Tokyo

Hey everyone, I will be staying in the Shinjuku area of Tokyo and will arrive on 31 Aug in TKY.

Are there any popular weekend flea markets that I could check out? And also cool cheap shopping places that I could go to? Any hipster shopping places to check out around the area?

And any other interesting parties/clubs to check out too. Appreciate all the advice I can get, thank you!

Ueno market, across the street from Ueno station is pretty close to a flea market. You can get lot of things cheap.

100 yen shops (dollar stores) are all over the place. You'll see the "100\" sign.

http://www.sunnypages.jp/search/tokyo_sightseeing/100yen_shops

Check this sight for anything in Tokyo, including the clubs....

http://www.sunnypages.jp