In Europe these machines usually goes for around say $700 but the price varies a lot. If you are able and willing to pack it up properly and ship it it will probably go for more at an auction site, but as you know it's a big and heavy machine.
Btw, the later versions of the IIc obiously sells at higher prices. If yours is the latest version which is gray instead of black, they easily fetch more than $1000, again in Europe. (I've seen prices ending at more than $1500 for "like new" ones.)
You cannot really compare the price level of a IIc to a Ic (35mm film only) or a V35. The IIc is in a class of its own.
//Björn