If it doesn't say it works, it doesn't.  Even if it says it works, it still probably doesn't work right!

I am not sticking up for the seller, but the listing is $100.  I have learned from my selling that there's a point in which it isn't worth my time and effort to sell an item.  I would rather have someone list an item and give it a chance to sell than to just throw it out.  If it's only worth $50 to you, send the seller a message and mention it.  It might take time, but most people will take a fair offer eventually.

I learned my lesson listing a 1960's Ampex tape recorder with a starting bid of $1.00.  The effort to pack and ship that wasn't worth my 70 cents I received.