This set is pretty rare. Condition is everything with these early Scanlens sets and these seem a bit rough. Price wise it is hard to say, in their current condition maybe $2-$3 a card, any that are in excellent condition might be $6-$10ea, more for names like Lewis and Mal.
A set of the NSWRL set from the same year (182 cards) in better condition went for $250 on eBay recently.
A few nm sets (including checklists) went from the same seller on eBay a year or 2 ago in the $400-450 range. NRL card prices have in general dropped since then and as mentioned these cards are OK but not nm.