An object like this one is always hard to sell, you'll have to have patience to sell it on ebay. Ebay is not the ideal system for these kind of objects, here in belgium we have several other similar sites like ebay, but with other systems... eg. a permanent advertisement for your item (untill it has sold ofcourse), you should look for a site like this one.
btw: nice try advertising for your item here on the forum full of potential customers ...