how old school? i can recommend a lot of good stuff.
are you looking for specific tracks or general artists?
i'd recommend anything by KRS-One, Boogie Down Productions, A Tribe Called Quest, De La Soul, Eric B and Rakim, Beastie Boys, Run DMC, Biz Markie, Public Enemy, Ultramagnetic MCs, LL Cool J, The Roots, Whodini, Jurassic 5 and EPMD.
some other good old school tracks:
DJ Kool - Let Me Clear My Throat
Das EFX & Redman - Rap Scholar
House of Pain - Jump Around
Naughty by Nature - Hip Hop Hooray and OPP
Maestro Fresh Wes - Let Your Backbone Slide
Snow - Informer
Grandmaster Flash and The Furious Five - The Message
Kurtis Blow - The Breaks
Biz Markie - Vapors
Young MC - Bust a Move
Tone Loc - Funky Cold Medina
Afrika Bambaataa & The Soulsonic Force - Planet Rock
2 Live Crew - Me So Horny
Kool Moe Dee - No Respect
Let me know if you need more
