There's a promo for Mass Effect Andromeda in that it can be purchased for $59 after trading in any single Xbox One, PS4 or Nintendo Switch game. When I inquired in store, the cashier (coincidentally the store manager) told me any game could be traded in as long as it's in re-saleable condition - defined by the inclusion of the unscratched disc in its original case.
Below I've listed a few places that sell the cheapest game (that's easily accessible) for you to trade in for the promo:
Option 1
A pre-owned copy of Skylanders Swap Force with the portal (Xbox One and PS4) go for $8 at EB themselves - which is cheapest Xbox One/PS4 game to use for the promo.
$8 + $59 = $67
Option 2
Battle Worlds: Kronos and Super Dungeon Bros. both go for $9 each at JB Hi-Fi. While they are both clearance titles, they are (arguably) the least-desired games on the shelves so there should be enough.
$9 + $59 = $68
Not bad, jb has it at $69 if you want less fuss.