What are the best cheaper EARBUDS that will last me at least a month without being faulty?

The Sony MDR-D100 Stereo Headphones are terrific. I'm a retired part-time announcer for a midwest talk radio station so it goes without saying that after a four hour shift on the air a headset that not only sounds great but is light weight and easy on the ears is a necessity. Sony's MDR-XD-100 Stereo Headphones fill the bill. And you can't beat the price.