What is a ihagee parvola camera worth? Approx late 30's camera fdeckel-munchen compur lens.?

It depends on which model you have and it's condition. The normal ones in good condition are in the $100 range, but some of the models can fetch over $200. If you want to find out exactly: I've written a free 7-part mini guide "How to easily determine vintage camera values yourself". You can download it from www.vintage-camera-online.com.