Best place to sell a Wild macroscope?

[hairykrishna]

I'm having a sell off of various scientific gear I have accumulated and, amongst various microscopes, I have a Wild 420 macroscope. It's my understanding that this is a pretty desirable device for macro photography. Does anyone know of any specialist places that might be a better venue to sell it than eBay? I've never sold anything remotely similar before so I wouldn't know where to look!