Methods and systems relating to a reseller analysis tool are described. In some embodiments, electronic commerce transaction information associated with a plurality of electronic commerce transactions occurring using an electronic commerce system is received at the electronic commerce system. A set of resale transactions from the plurality of electronic commerce transactions is identified using the electronic commerce transaction information, including identifying the set of resale transactions based on resale criteria capable of indicating a sale of an item by an entity that previously purchased the item using the electronic commerce transaction system. A set of rules associated with resale transactions is generated, including generating the set of rules based on the electronic commerce transaction information associated with the set of resale transactions. Based on the set of rules, user transaction information relevant to a transaction associated with a user is provided.