Hi Mark,
Welcome to the forum! And Perth-based too!
Wow, great old collection still in the (really big) shoe box!
Here's a quick link for the league cards so you can figure out which cards are from which year (there are others);
https://www.gamedaytradingcards.com/scanlens-rugby-league.html
You have other cards which also have value.
Condition is a big thing though, so if you plan on keeping them, head into Al's Cards in Perth and get some quality card storage - either hard plastic boxes or folders and 9-pocket ultra-pro sleeves. Step one, rubber bands are a big no-no - carefully ditch them.
One word of advice, reject any and all offers until you are up to speed with the values of cards from each of the earlier series (some teams are more sought after, some players command premiums) and how condition (eg even a slightly worn corner) affects value. eg, if you have any unpeeled 1974 stickers, you could be looking at $200+ each, depending upon teams.
Welcome back to the world of footy cards - it has changed a LOT!
Regards
Mike