no that makes no sense, MSRP is a fixed stated price by the manufacturer and you can't do anything to change that.
MSRP is a base value, and base values are essential to determine a product's comparative pricing.
otherwise you wouldn't even be able to trace $/GB at all because of all the price variance by tax, promotional sales, bulk pricing, shipping overhead, etc.
not to mention you wouldn't even be able to compare price between countries with ridiculous tax and shipping overheads.
edit: by your logic those free thumbdrives i got because i purchased $500 worth of stuffs should be factored in the chart, which would've driven the $/GB ratio to $0/GB but it didn't.