I just saw somebody else post one, and I remembered I have one and I have hardly used it. I was so excited about it, it took like a month to ship from Poland, and I had a hard time sleeping with it. I am not a sleep mask kind of person. It worked for my friend once or twice when he spent the night. I had a hard time with it. I paid 200$ for it. I am willing to negotiate a price. Please be in the United States. I am in Maryland. Message me if you are interested. Please be aware that it doesn't work for everybody. As I am a prime example. thanks.