If they are klonks-(12mm and up), they are quite rare and valuable. There isn't a lot of market in 12mm klonks out in public. They seem to be too rare to just go out and get one in most places. You have to really ferret them out, so they are worth what you can get for them- or they are worth what you would let them go for. 4 figures at the least.
In other words, that is quite a rare peice and marks you as a collector of distinction. Do you mind telling us more about it and how you acquired it? This is the first good quality klonk I have seen on this forum, except for Zeide's and that is a remarkable coincidence. I almost feel like I have seen it before, so you may understand how Slraep feels. Deja vu all over again.