howdy H81. I just bought,about month or so ago,a cibola new never used in the box from a lady.the package had a pair,also brand new,of Calrad 15-135B headphones.These headphones have stereo/mono switch and adjustable volume on each ear.I researched them and they sell for just under $20 to $34.99. Thus far they seem quite capable and well made and the 10.5 cord certainly seems heavy duty and is not even stretched as of yet.
I would give maybe $25 for them if i were to have to buy a set and i am on a budget-