Used Sennheiser RS120 Wireless (RF) for $29

The Sennheiser RS120 Wireless (RF) headphones are available in “Used – Very Good” condition for $29~ by Amazon Warehouse Deals actual. There are multiple listings of this, so there’s always the possibility of price pressure dropping the price further down.

These are RF wireless (not bluetooth). You get the transmitter base and a headset. The headset can only be used with the transmitter base, it does not have a 3.5mm input. They average 4.1 out of 5 based on over 13,500 customer reviews. A couple of issues of these are a quick disconnect on silence in the audio and wonky AC adapter connection to the tranmitter base.