Questlove, is of course the drummer from The Roots, and as put together a mix of sampled songs that popular hip hop songs have borrowed from which provides an interesting and alternative journey.
https://www.mixcloud.com/SoulCoolRecords/questlove-samples-mix/ is a cool way to start a Saturday morning or perfect for a lazy Sunday.
It’s not focused on the super rare stuff, more a personal trip through the history of samples and focuses more on samples which are classics in their own right rather than rare for the sake of being rarer than a hen's teeth!
The Journey continues here: https://www.mixcloud.com/SoulCoolRecords/questlove-the-lesson-mix/ and also http://www.mixcloud.com/SoulCoolRecords/east-village-radio-frozen-files-lord-finesse-diggin-special/