i want to know the price of house for sale in america?

can you tell me some information about the housing in US, in some cities as new york, san franscisco, and washinton and so on
i found some very cheap in yahoo real estate, is it real or what?
just 3000 dollars for a big fabulous house.
if it is, what a amazing thing compared to thoese in japan even in china.

thank you

i am now studying in japan, chinese, i want to go to america someday, not just for buying house, for my ideal