I have saved two gold crowns from 30 yrs ago. They weigh 1 1/2 ozs. Do they have any monetary value?

Yes they do have value. You'll just have to find a precious metal dealer willing to buy them from you.

Yes, they can definitely fetch you good money. How much money? Well, that depends on the composition of gold in the crowns. If they are made of 22k gold, you will get a big sum for the crowns, whereas if they are 22k gold-plated, you would want to keep them for yourself rather than sell them off.
Also, the stones studded on it will affect the sale price - the more stones, the lesser the sale value.