Well had a decision made for me. Found several foil packs of Upper Deck hockey cards premiere edition where the glue or seal failed but cards in excellent shape hopefully I'll find a rookie or novelty card. They were in boxes, bags etc in but they were also stored in an attic for several years my guess heat-had them low near ventilation but the attic or time(30 years) got them. Ignored them when the sports card market dropped a few years later. The wax packs held up better.
Some say card packaging themselves might have value? It's scary stumbling on instructional videos on how to 'open' a pack of cards. That tells me some might have been hunting for the good ones then replace and reseal the package ie fraud.