Acquisition of an animal when money changes hands, even though the purchaser has not moved the animal as would be required for transactions between Jews: Bechorot 13a-b
The power of verbal commitments in nochri society and transactions between Jews and nochrim: Bechorot 13b
Merchandise Issues
Dealing in items which are forbidden to Jews in benefit, and putting them into the non-Jew's share: Kiddushin 17b
