There's a news story over at the BBC website,
First records, and where you bought them, which made me think. So, confession time.
My first single was
Roadrunner, by Jonathan Richman and the Modern Lovers.
The first LP I bought was Dark Side of the Moon, by Pink Floyd.
Both were, I think bought on the same shopping trip in late 1977 at a rather ace record shop in Edinburgh called Phoenix Records. Located on the High Street, it is sadly no more. These were the days when browsing for LPs was a process of leafing through racks of sleeves covered with clear plastic jackets, all greasy from other people's fingers. It may be that my ageing memory is at fault, but I am sure I recall the LPs being arranged by Record Label rather than artist.
Shortly after, I got caught up in the Year Zero of punk/post-punk (you can see my current tastes in this
graphic representation of my last.fm scrobbles). The Pink Floyd disappeared, but more mysteriously (given the cultural circumstances), so did Roadrunner. Both are now present in my digital and digitised collection. Here's a YouTube video: