The Sony MDR-V6 definitely qualifies as a classic headphone. It was introduced way back in 1985, and while Sony has since released a string of "improved" and more expensive V6 inspired models -- the MDR-V600, MDR-7506 , and MDR-7509HD -- the $109.99-list MDR-V6 is still available.
The Sony MDR-V6 closed-back, full-size headphones sound great and are comfortable to wear for hours at a time; Their sound is also very well-balanced and crisp -- they sound great for the money
With its coiled; pro-style cable and lack of an inline remote/microphone; some will find the V6s less mobile-friendly than more modern headphones