iPhone 7
My wife is awaiting the announcement of the iPhone 8 on September 12. She uses an iPhone 4. It's getting clunky.
I have recommended that she buy an iPhone 7 if she buys an iPhone at all. The "gotta have it" crowd will be buying the iPhone 8. At that point, the iPhone 7 will look good for the price.
That assumes that she won't buy a Samsung Galaxy 7S. It will look good, too.
Google's Pixel 2 may also look good. But when?
I knew a man 30 years ago who sold used video equipment. His company's slogan: "trailing-edge technology." The equipment was reliable and cheap. It got most jobs done.
Fact: you are the weak link, not the technology.
Before you buy a new smartphone, figure out what you really need. They all have so many bells and whistles that you can barely hear these words: "good enough."
If you won't use a feature, don't pay for it.