JVC HA-S150. Picked up a set of these with damaged packaging for $7. Quite impressive for the price! I like them better than the Koss KSC-75, which was IMO the best sub $10 headphones around. The JVC’s seem to get louder and don’t have the “plinky” sounds that I hear in the Koss. Plus I like overhead “cans” much better than any other style. My new standard throw-away headphones, until something better shows.
Note: Headphone sound quality is a very touchy subject. What sounds good to you is what really matters!