Today I watched the retro-meta-iconic power walk scene in Reservoir Dogs again, which features the song "Little Green Bag".
This song by the Dutch George Baker Selection reached only no. 21 in 1969 on the U.S. singles charts, and their other productions were utterly unremarkable. It was probably not part of the "collective U.S. musical subconsciousness", at least not in its mainstream.
How did Tarantino choose that song? He probably didn't have "song scouts" back then presenting finds to him. (Does he now?) Did he simply choose from songs he knew, possibly after some digging of his own?