If something of that size is available for that price, there must be something wrong with it.
Something of that size available for that price must somehow be damaged.
事故物件 = damaged goods, stigmatized property
アパートや家だったら、その中で誰か死んだことがあったというのは、「someone must have died there」と言います。
何かの犯罪に関係あるでしょう = it must have been involved in a crime
何かちゃんと動かないでしょう = it probably doesn't work right
アメリカ合衆国 
