Is AUTHOR wrong in the post ? POST : I just heard of this place and I wanted to know if I am in the wrong. So recently I purchased a new phone for $749 and I showed it to a family member who also loved how it looked. She was currently using my old iphone 6s (perfect condition) that I let her borrow because her phone broke. She decided to upgrade to the same phone so we went to the store together. When I got to the store I saw that the bigger model was much nicer. I suggested that she buy the bigger model and I would pay her $150 and swap phones with her. She agreed. However when she was going to pay for the phone she actually heard there was a trade in promo. The promo would give her a $250 discount if she traded in the iPhone 6s. At the time I wasn't really thinking much about it, but she traded it in and ended up paying 649 for the phone instead of 899. When we got home and switched, she asked for the $150 dollars. I told her I would go get the money, when I realized she actually sold MY phone that I let her borrow. So I went over and told her that because she got a discount on the phone using my iPhone 6s I dont think I have to pay her. She got very mad and said that I'm a dirty scammer. However in the end she still paid $649 for a $749 phone. Am I the asshole for not paying her even though she saved money by trading in my own property?