I know this has been how it's been for years, but I really wonder if it's possible for the developers to maybe look into changing the coin-valued prices of the items. As it's really weird how a item that costs 500k ingame cash can cost 50 coins, but then a item that costs 1 million ingame cash can cost 50 coins too. This is the same with a lot of vehicles aswell, as a Type 1 engine can be bought with either 5k credits, or 25 coins, which is half the amount of coins required for a Police Academy that costs 500k.
Type 1 Engine = 5k credits, 25 coins
Type 2 Engine = 5k credits, 25 coins
Quint = 19k credits, 25 coins,
Police Academy = 500k credits, 50 coins
Police Aviation = 1m credits, 50 coins.
This is like it for every single vehicle and building, some balancing would be nice and maybe people would buy credits more if it's balanced.