Matt A.
Yelp
Just down the street from hipster-haven, AKA, Rotate This, you'll find Cosmos. Two locations actually: The original and the new one down the street.
Unlike Rotate, this place is about music rather than image or snobbery. if you want an education, you'll get one here - without eye-rolling, snickering or any general try-hard bull shit you'll find at Rotate.
This place is basically mecca for soul,funk, psyche, brazilian, latin, afro, jazz and hip hop collectors. It's world renowned in fact. But even given its international repertoire, you'd never know it based on the friendliness of the staff. Zero attitude. Always.
But, truth be told,this is likely not the right fit for an amateur collector. Yes, the prices are high. BUT, that's what these records are worth. They're rare. So the prices reflect that.
But, if you're a huge nerd like me, and records are basically your heroin, Aki is the most reliable dealer in town.