I have decided to to an advertising campaign. I have placed ads in Linn's Stamp News and the American Philatelist. They should be appearing shortly. Hopefully this will drive more traffic to my website.
I have also reached out to a Shopify Guru to see if there is a way to get the alphabetic sort to sort the catalog numbers correctly. The Title of the listing is Alphanumeric. I know from my IT training that when sorting, the computer reads alphanumeric fields left to right, byte by byte. This is an issue for catalog numbers in the Title. Great Britain 1000 comes before Great Britain 90 because the "1" in 1000 is less than the "9" in 90. The Guru says he can make the change. I will be very happy if it works. I will keep you posted.