East African Safari Rally Memorabilia question

I have a load of East African Coronation Rally / East African Motor Sports Club badges my great uncle had on the front of his car and am thinking of selling them to help fund the restoration project.  Does anyone have any idea what they might be worth / where to sell them?  I’ve had a look online and can’t really find anything like them so think they might be quite desirable.  He was an official at the rally for quite a few years, don’t know how many officials there would have been.

I also have a cup he won in a Miles Per Gallon challenge / race.