I thought maybe there had been typographical error so went to ebay to see how the coin had performed in completed auctions and what current auction sellers were asking. From comparable coins offered I found a high price being asked of $800 for an AU55
http://cgi.ebay.com/Germany-1950-AU-55-10-...emZ220099255622 ,a lower priced XF40
http://cgi.ebay.com/Germany-1950-XF-40-10-...emZ220099255604 , and a few others priced in between. From the images provided on these auction items I would say my coin is much the better.
My coin scans

Now, I do realize I got quite the bargain with the purchase of this coin. It is but one of about 700 "junk" coins I recently purchased from a large retail dealer that dislikes world coins. So far I would place the value of these "junk" coins at around $3,000, which isn't too bad considering I paid under $50.00 including tax for the lot. But that valuation is entirely dependent upon the resources used to value my coins. Am I safe to continue my heavy reliance upon Krause mixed with current selling trends I find on the Internet? I had originally placed a value of $150.00 on my coin until I checked the listings on ebay and found the NGC graded coins. Further, would it be prudent of me to have my coin condition graded by the Numismatic Guaranty Corporation? How much faith should I place with grading provided by NGC? What could I expect to pay to have NGC grade my coin if I choose that course?