Cousin Justin posted a nice selection of old school rap LPs and 12″s.

Included is Run DMC’s first, self titled LP:

From All Music:

Prior to this, rap felt like a block party — the beats were funky and elastic, all about the groove. Run-D.M.C. hit hard. The production is tough and minimal, built on relentless drum machines and Jam Master Jay’s furious scratching, mixing in a guitar riff or a keyboard hit on occasion. It is brutal urban music, and Run and D.M.C.’s forceful, muscular rhymes match the music. Where other MCs sounded cheerful, Run and D.M.C. prowl and taunt the listener, sounding as if they were a street gang. And while much of the record is devoted to braggadocio, boasting, and block parties, Run-D.M.C. also addressed grittier realities of urban life, giving this record both context and thematic weight. All of this — the music, the attitude, the words, the themes — marked a turning point for rap, and it’s impossible to calculate Run-D.M.C.’s influence on all that came afterward. Years later, some of the production may sound a bit of its time, but the music itself does not because music this powerful and original always retains its impact and force as music.

Check out the rest of the All Music review on this LP and listen some audio clips.

There’s also Lord Finesse and DJ Smooth, Funky Technician:

Both Justin and I have heard this played a lot on Sirius on XM - it’s definitely a classic among classics.  From All Music:

It’s a simple formula: bring together one of the East Coast’s finest rappers with some of the most clever trackmasters in hip-hop, then add in a stellar DJ, and the results are bound to be exciting. Funky Technician was just that, an excellent LP of battle rap with Lord Finesse simultaneously claiming and proving his immense skills over a set of funky backing tracks that used the familiar James Brown blueprint but delivered it with unobtrusive class and innumerable displays of deft turntable wizardry.  read the rest of this review and listen to some audio clips