I never bought singles (why buy singles when for just a little bit more i get a whole album with that song on it?) but first album ever (vinyl) was by Whitney Houston from the 80s sometime (may have been her first album ever).
First CD though was a live CD from Genesis "The way we walk".. huge step up qualitywise and a sign i was improving my taste in music
WHen I was buying singles, they were about $AU1.00 each. An album was around $AU5.95 each (1972-3). When you were getting $5/week pocket money, that was a very big difference.