Talk:Inheritance/@comment-28168845-20180422115701/@comment-26829117-20180422123251

Your maths is flawed
 * 600 - car full price, upgrades 0000000
 * 480 - car at showcase discount, upgrades 0000000
 * 538 - car upgraded for career, upgrades 5353334
 * 728 - car fully upgraded, upgrades 5454334
 * 1138 - car full price, upgrades 5353334
 * 1028 - car at showcase discount, upgrades 5353334

So the cheapest way to get this car will always be to win it in the special event because it also has upgrades. The price of the car is free in a special event, you are buying upgrades. Now, if you don't car about completing series or doing anything but winning cars then you are correct but that's a pretty limited way to play this game.