Whether we like it or not, standarisation and 'sliced' pricing (to keep the headline price low) is how western commerce now operates. This has spread across many areas and one of it's earliest forms was the motor car sales pitch. "Ah, if Sir would like the British Racing Green colour - that is only available on the XLE model" etcetera.
Your only option is buy and 'Agree To Terms and Conditions' - or Not.