Old Replacement iPhone (Bellevue EH7)

Hello, the battery on my trusty iPhone7 is finally kaput, and it's now sadly unusable. If anyone has an old unlocked (or EE) one they no longer need it would be really appreciated. I could make use of any iPhone though I like the older 7 or 8 ones. I can help to quickly factory reset before collecting. Please let me know if you may be able to help with this. Many thanks