That depends on your definition of "decent". How does your $25 device integrate with the steering wheel controls and the car audio system?
My $15 device in my 2006 Tiburon integrates with the car audio system just fine - I just plug it into the aux port. I can easily answer a phone call but pressing the button on the device which is glued beside the radio.
It doesn't integrate with "steering wheel controls" but not all cars even use those - even newer ones. I've also got a brand new 2017 Colorado that has integrated bluetooth but the controls for answering and hanging up are still on the entertainment system's touch screen. There's nothing on the steering wheel except cruise control.