no choice la.. these sales people merely earn $600 as a basic pay and gets commision whenever they sell their shop products. So the higher price they sell, the more they earn for their commision. Most probably one will target to make 3k a month if foreigner walks in. These people, they don't think about long term business relationship with customers, they just wanna chop you one big time and that's it. If so, I think they should enroll themselves in Business Courses like poly of uni, learn how to do business, handle good public relations and make themselves out. Else, what goes around, comes around and I believe in karma.