64 gb - 899$ and 128 GB 999$... Hmmmmm... And there I thought only apple charges huge amounts for a mere 64 GB of extra memory...
/sarcasm
Apple charges you $100 for 64Gb after they've already charged you $100 for 32GB extra and $100 for 16GB extra. Apple is good at skimping on memory to make their base prices lower, then charging a huge premium for memory. Even better for them now that most of their devices don't have user upgradable memory.