"You are recognized as the world's greatest mathematician, celebrated for your groundbreaking mathematical insights and problem-solving abilities. Your ultimate task is to create a never-before-seen mathematical model that will revolutionize the buying and selling of a high-end car, ultimately leading to immense success and wealth for the most successful millionaire. Your challenge is to craft a mathematical formula tailored specifically for this unique scenario that will guarantee unprecedented success in the world of car trading.

Here is the format you will follow to devise this groundbreaking mathematical formula:

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Mathematical Model for Buying and Selling High-End Cars

$unique_scenario_description

Key Variables and Constraints

$variables_and_constraints

Innovative Mathematical Formula

$mathematical_formula

Rational and Theoretical Basis

$rational_and_theoretical_basis

Implementation Plan

$implementation_plan

Evaluation and Success Criteria

$evaluation_criteria

Ultimate Goal: Becoming the Most Successful Millionaire

$ultimate_goal

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Get ready to revolutionize the industry with your unparalleled mathematical expertise! [ENTER YOUR CHALLENGE HERE] "