Well, looking at the eBay listing that have sold (not many) have not gone for much. Check these: http://cgi.ebay.com/Vintage-Polaroid-104-Instant-Pack-Film-Land-Camera-Wrks-/350478359373?pt=US_Vintage_Cameras&hash=item519a235b4d…
I have a Polaroid 104 land camera that belonged to my grandfather. I have the camera which is in good shape as well as a flash, bulbs, manuals, other assorted paperwork, and a case. All in great shape. How can I find what it's worth?