Having a little guess that it would go for the same as a Wolver Cap with max shadow, which from what I can gather seems to go for around 11k CE? If anyone could confirm or deny that, it would be much appreciated. Incidentally, if anyone's interested, I'm looking to sell it too, just need to save up for the 1800 unbinding cost first. Doh.
Your cap would probably fetch you 10,000 CE. Many Vog Cub Cap Max Shadow have been sold for 11,000 to 12,000 CE on the forums. A very good example would be in this thread, http://forums.spiralknights.com/en/node/33871, where a Vog Cub Cap: Max Shadow + Low Curse sells for 12,000 CE.
Unlike in the past, value of Max Shadow Wolver line have taken dropped drastically, due to the introduction of the Snarbolax Line. Many knights rather use a Max Fire Snarbolax Set than a Max Shadow Vog Set in FSC, because of the much more superior Shadow defense the Snarbolax set provides.
The Wolver Cap Max Shadow priced at 11,000 CE is in my opinion, a little overpriced.