I remember my firsts. (Cassettes, MP3s — I have no idea.)
LP
The Beatles, Something New (Capitol)
It must have been 1964. This LP must have been a present for my birthday (eighth). Help!, still among my records, still playable, was my second LP.
CD
Son House, The Complete Library of Congress Sessions, 1941-1942 (Travelin' Man)
Mississippi John Hurt, 1928 Sessions (Yazoo)
David Murray, McCoy Tyner, Fred Hopkins, Elvin Jones, Special Quartet (Sony)
World Saxophone Quartet, Metamorphosis (Nonesuch)
Yes, blues and jazz. I bought these CDs in 1991 in Bloomington, Indiana, at a record store specializing in blues, jazz, and classical music. Yes, the store is now defunct.
DVD
Carnival of Souls (Criterion Collection)
Herk Harvey's great 1962 horror film. I'm not sure when I bought this DVD (2000? 2001?), but I remember wondering whether a DVD purchased in New Jersey would play on a computer in Illinois. One reason among many that I think of my name is a synonym for naïf. I had heard something about "region codes."
Do you remember your first analog and digital artifacts? Please, share them in a comment. (Why not?)