my friend did some maths, here are your odds of getting Y many uniques after opening X many boxes



tl;dr the odds of getting all eight with the purchase of:
one pack: 0.24%
two packs: 30.7%
three packs: 70.3%

Imagine spending $264 + S/H and still having a 1-in-3 chance of not getting all 8 magnets