Google store has iphone 7 32 gb at 246 trade-in value. If you don’t have it, it can be easily found at around $70 for second hand, so the total cost is $53+70. No hassle like instore port-in needed.
There are other trade-in options, but iphone 7 is the sweet spot, since iphone 6s is only $100, and iphone 8 is $242. (Yes, they made it lower than iphone 7, if you want pixel 6a. If you want pixel 7, it’s at $295).
https://store.google.co