I bought a new Beyerdynamic Opus 99 Bass drum mic in Germany about 10 years ago and used it only once. I don't do any recording any more and I want to sell it but I don't really know how much it's worth.
I'm grateful for any advice on what one of those is worth nowadays.
These are the specs: http://www.polaraudio.co.uk/datasheets/opus99.pdf
thanks in advance.