Sentence:  Whoever had purchased this supply of arms had scoured all the darker bazaars of the international weapons market, buying a lot here, another lot there, an <WSD>oddment</WSD> in a third place. 
Meaning of the word marked with <WSD> tags:  An item that was originally part of a set but is sold individually; an excess item of stock.<ref>N. H. Mager, "Prentice Hall Encyclopedic Dictionary of English Usage," 1993, p.(nbsp)263: “'''oddment''' part of a broken set.”[https://archive.org/details/isbn_9780131571655_0]</ref>