It's always interesting to go back and look at these ads from various 8-bit software/hardware dealers of the 80s to see what was available. I swear some of these places must have literally been fly by night. I never remember seeing and ad for this particular dealer until I ran across this one recently.
This particular ad is from the June 1984 issue of Commander magazine, a Commodore 8-bit publication. What's interesting about this one is that it is early enough to show cassette based software for sale. The Commodore 64 had been introduced less than two years before and had not been widely available for too long at this point. However, it's pretty clear from this ad that cassette based software, while certainly available in North America, was never as popular as disk or cartridge based software.