Might need some better pictures. It could just be your camera, but there appears to be oil residue on the surface of your coin. Can you clarify if this is the case?
Graded Casascius errors around the MS67 range have sold for ~4 BTC in the last few months, though there have not been many sales lately. MS65 might fetch 2.5, or a little more? Again, this is tough. 6 months ago we would have been able to answer this question with more ease.
That said, I would not let an ungraded error that is "good condition" go for less than 2.2 BTC. Sorry I could not be more helpful