Should i sell my iphone 5s or keep it?

So i want to get this jacket online for $65 dollars but the thing is i have no money. I'm 17 and still in school and i tried getting a job this summer but it did not work out so i'm probably just gonna wait. I checked the best buy site and there trade in value for my old phone is $155 dollars. I have a primary phone but its and old LG phone that my parents paying for. The thing is i love my iphone 5s very much and love apple apps. Do you think i should trade?

Do whatever you want to do. Why do you need others to tell you what to do?

Don't sell. You'll regret it for sure later.