I guess as they tell me the very light amber or fancy they use to make candy so there isn't a large amount to sell, so the price is higher.
It is the same here 45 to 50 dollars for the medium and dark amber. When we first started buying it it in the 1960s it was 8 dollars a gallon and I had a place what would always save me a gallon of fancy every year.
I find that most people like the darker syrup because it has more flavor.