I am poor, and mostly use my headphones to watch movies on the bus, so I really don't care about quality other than to block out external noise.
I am currently using
these from Monoprice for about 6 bucks a pair. Not much if any interference or 'clicking' from static like other cheap ones I have found, but if I am wearing like a ski jacket or something, I occasionally get some vibration noise as the braided cord rubs on the nylon.