I have an iPhone 5s and the battery is shot. I can get a new battery for $8 but I watched videos and doubt I could do it myself.
Every shop I contacted wants at least $75 or more to replace the battery. I can get the same phone new for $99.
So I ordered an iPhone 7 plus. Verizon is offering $400 trade-in on my 5s even though it's not worth anything close to that. But I'm locked into 2 more years