if by "equivalent" you mean a new modern flagship phone, then no, you won't find one. but a $200 new phone this year is at least the equivalent of a pixel phone from five years ago.
>>notato+(OP)
And the (Android) phone from five years ago won't be getting OS or security updates. Granted, your current phone that needs the new battery probably isn't getting them either. In which case, why not just pay $80 to get the battery replaced in your current phone?