Ah ha! So, you should be well aware of or even a repeating customer of the shops like Chuko Camera Box or Shinjuku Chuko Camera Shijou.
i am a regular at 新宿カメラのアルプス or something like that (name is weird and i keep on forgetting it). the shop keepers know me by face and we sometimes exchange repair notes
lucky is also one of the places that i visit but i like camera alps the most because they have been honest and reasonably OK to me. MAP camera is a place that i have been shopping since I came here in spring of 2010. the other places, i just visit when I happen to pass by. kitamura is OK, i am hitting on one of the girls there. 中古のカメラボックス, well i have bought stuff from them throughout the years, very friendly but the junks there can be a bit pricey. miyama is the friendliest, ニューカメラ is snobbish.