I don't think Apple ever adjusts the price of existing products, for better (eating the cost of part shortages) or worse (over-charging for old parts). The real test will be what they do with upcoming products.
I can't find specific examples, but I'm almost certain they have at some points in the past adjusted pricing of upgrades mid-cycle.
I can't find specific examples, but I'm almost certain they have at some points in the past adjusted pricing of upgrades mid-cycle.