Aizuya Inn is a very affordable hotel located in north-east part of Tokyo. The hotel rates start from around 2000 yen/bed/night. The longer you stay, the deeper discount you get.
Akihabara is a major shopping area for electronic, computer, anime, and otaku goods, including new and used items. New items are mostly to be found on the main street, Chūōdōri, with many kinds of used items found in the back streets of Soto Kanda 3-chōme. New parts for PC-building are readily available from a variety of stores. Tools, electrical parts, wires, microsized cameras and similar items are found in the cramped passageways of Soto Kanda 1-chōme (near the station). Foreign tourists tend to visit the big name shops like Laox or other speciality shops near the station, though there is more variety and lower prices at locales a little further away. Akihabara gained some fame through being home to one of the first stores devoted to personal robots and robotics.