Talk:RR3 Wiki:Upgrades Strategy For 100% Completion/@comment-38443491-20190523101128

In Pro/Am's Classic Skyline Challenge it says the fully upgraded Skyline costs 21 GC, so there is a GC profit of 51-21= 30 GC, while, including the price of the car (50 GC), the full upgrade cost would be 71 GC, meaning there wouldn't be any returns for that investment.