A thief's hand was not cut off for stealing something cheaper than a Hajafa or a Turs (two kinds of shields), each of which was worth a (respectable) price.
Reference: Sahih al-Bukhari 6793 In-book : Book 86, Hadith 23 USC-MSA web (English) : Vol. 8, Book 81, Hadith 785 (deprecated)
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