What are the best headphone products that I can buy which fall between 100 and 200 US dollars?
The optimal headphones for an affordable price range will depend on your personal preferences. However, here are some options to consider:

Behringer XM8500 Wireless Headphones - These over-ear noise canceling headphones offer clear sound with a comfortable fit. They're also budget-friendly at $100 but come with a limited three year warranty.
Samson Q2U Over-Ear Bluetooth Headphones - For under $200, these Bluetooth headphones provide high-quality music without sacrificing comfort. They have a large battery capacity, so you can listen for long periods of time without worrying about charging them up. Additionally, they feature active noise cancellation technology to help cut down on ambient sounds.
JBL Quantum 800 Wireless Headphone - If you want a good set of wireless headphones for around $150, look no further than the JBL Quantum 800. They offer excellent bass response and clear sound quality, making them a great choice for anyone looking for an affordable option.
Grado SR80e Wireless Headphone - For those who love listening to music in a quiet environment, the Grado SR80e is a great choice. It's designed to block out background noise and deliver clear, accurate audio throughout the room. At just over $200, it's not the cheapest option on this list, but its sound quality definitely makes it worth considering.
Overall, when choosing headphones, it's important to consider factors such as comfort, sound quality, and features like active Noise Cancellation and Bass Boost. When shopping within the recommended price range, be sure to comparison shop and read reviews before making your purchase.