Can anybody tell me the value of this gold coin!?

Is that a bottle cap in the picture so we know the size of your coin? Maybe just measure it instead.

The search engine on images on here popped up with this one which if your second image is rotated 90 degrees seems to look like it…. 

Weight 12.37 but there doesn't seem to be any dimensions added to the listing. 

2 Stater - Lysimachos (Kolchis imitation) - Bastarnae Celto-Scythians – Numista

Edited to remove last thought regarding imitation it says Kolchis imitation. I need more coffee!