So i've been looking at your car plugins but it seems like none of them does what im looking for?

I want players to be able to buy full cars through GUIShop so all that is needed is 1 command to spawn a full car

Doesnt seem like there is any command to spawn a full car with like low-high tier components in any of your plugins?

Spawn Modular Car has the feature you describe. Other folks have used it with GUI shops before.

First, you define a car preset in the config, with a name and modules. Optionally you can specify fuel amount, engine parts, lock settings, fresh water, etc. After reloading the plugin, you can then spawn the car for a player with the givecar <player> <preset> command.

Thank you will try it out, The plugin page looked really confusing at first :P