Since those don't turn up often it is hard to give a value. I saw a set at Iowa gas several years ago priced at $300 and don't know if they sold as the guy left early.
There are only 2 pumps that I am aware of that made them for Fina. A Southwest 80 and a GB 1000 series, there may be others that I am not aware of. I know for a fact that they are at least 2 different sizes as the above mentioned pumps use different size glass.