Upbeat.., It's frustrating when people tell you there is some tab or selection and it's not there. That may be because people are using a lot of different versions of mac, iTunes, etc. I am using the latest mac catalina version 10.15.2 . When I click on what used to be itunes it now says Apple Music version 1.0.2.37. Then click on iTunes Store in the upper left hand corner, then CLICK IN THE SEARCH (upper left hand corner) AND ENTER SOMETHING TO SEARCH FOR, THEN you will see the "Apple Music, Your Library, Apple Store" options in the upper right hand corner. Make sure you click Apple Store if it's not the default. Then the old buy for $1.29 options should come up. My wife is deliberately holding her Windows iTunes at an old version and that may be a smart move if you want to buy songs the old way plus she claims apple is starting to fuss with cd loaded songs.