Spent the evening going through different Origin Store regional pricing, these are my findings:
Cheapest - Korean Origin:
BF1 ₩31,680 // $37.85AUD This is the one I purchased and this is the price that has shown up on my bank statement
Deluxe ₩46,200 // $53AUD
Ultimate ₩94,777 // $109AUD
NOTE: Korean Origin does NOT accept PayPal as payment, but my card details went through perfectly fine.
If PayPal is more your thing, the second cheapest prices I found are:
BF1 $41.94 // $41AUD
Deluxe $65.94 // $63AUD
Ultimate $128.31 // $121AUD
*All prices are rough exchange rates slightly rounded up (besides the basic Korean one since I purchased that and confirmed the price I was charged. I will post a comment of exactly how I go about doing this below in a few moments for those who do not know how.