Drop the straw-man fallacy... this isn't even close to one. I'm not misrepresenting your position nor oversimplifying. In fact I'm complicating the argument by adding the way to make it realistic (which you want) and then making a value judgement on what it would take. - since you're reading my posts you should know what I mean.
However, to avoid any confusion, I will tell you precisely what I meant, since you were unable to infer that. I stated, "You can simulate the real world with presenting a market, but it's not worth the time, effort, or resources", but that must not have been clear enough for you, I apologize. I won't make the mistake of being even closely ambiguous this time.
It's about opportunity cost and to make the selling prices better and that cost is too high, for me. In order to get it closer to being realistic, it would require work, which isn't worth the time and effort. Just changing a coefficient (which in your opinion) makes it better, doesn't make it better for everyone. But even if it was the best option, I'm making a value judgement on the topic of the selling car price. I would rather PD take the 5 minutes towards making course maker versus making the selling costs better. I would expect better to make it even remotely valuable. This would take even more time (a more complex solution). This makes it even more costly. If you feel that making the selling costs is a higher priority, then fine, but it's a misuse of time--- so yes, don't bother with it. The time is better spent elsewhere.
This paragraph is a more detailed version of my final sentence in my original post. "I'd rather have other features in the game, not deal with this rubbish."