There are many usages of もん, but the one I am interested in is using もん to replace もの (tangible noun). For example:
安いもん (lit translation: cheap stuff) can be used to replace
The question is, can it be used to modify a sentence into a noun in a complex sentence? For example:
このナイフは安いもんが結構鋭いわよ (Notice that the もん modifies the sentence into a noun in a complex sentence)
If I recall correctly, this is grammatically wrong because もん can only replace もの if and only if it is at the end of the sentence. For example, the sentence
このナイフは安いもん is grammatically correct, but not
I realize that one will still definitely understand the meaning of the sentence perfectly well, but is this structure actually ever used?