I would like to add to this as it's a really important part of RP in the game.
All of the above have valid points. I wanna focus a bit on the criminal part where criminals knowingly use expensive vehicles in their activities. Please let's not forget the legal governmental factions that have infinite amount of vehicles to spawn without considering any type of financial damages to the PD/SD/DOC property, that's 1 reason why criminals are actually better drivers than *most* governmental employees. Simply they fuck up their car by crashing or doing an OOPSIE and stall their vehicle, then they simply go de-spawn the car and grab another while the others will have to suffer the cost of repairs and etc...
You may tell me "But in real life, the government covers the expenses of the police vehicle.". True, but in real life, the police doesn't simply crash, change the car and rejoin the chase or whatever the situation is. Police have unlimited resources and no one talks about it (as I noticed, I may be wrong about people not talking about this.).
For me that's one big reason why vehicle costs shouldn't be high.
Okay, expensive cars should be more expensive, then high-end vehicles for the police should be way more strict because to state again that criminals overall are much better drivers than police because they have vehicle expenses (not better than all police, but most of the police drivers have some skill issue because its okay if they crash their vehicles), and "its okay to crash their vehicles and just spawn another one" is definitely not similar to real life.