A deck from the eighties is a resurfacing candidate, or it is not
Forty year old pressure treated frames go one of two ways. Some are entirely sound and only need a new surface, railing and stairs, which is far cheaper than starting again. Others have soft posts at ground contact or a ledger that was never flashed, and putting a twenty five year board on top of that wastes the board. We inspect it free and tell you which one you have.