YOU SAID:

So my friend knows a guy who knows another guy who has a cousin that knows a guy who sells them.

INTO JAPANESE

だから、私の友人は、彼らを売る男を知っているいとこを持つ別の男を知っている男を知っています。

BACK INTO ENGLISH

So my friend knows a man who knows another man who has a cousin who knows the man who sells them.

INTO JAPANESE

だから私の友人は、彼らを売る男を知っているいとこを持つ別の男を知っている男を知っています。

BACK INTO ENGLISH

So my friend knows a man who knows another man who has a cousin who knows the man who sells them.