Quote from dmo:
In an out-of-the-way market like yours Cowboy, I wonder if you could spread volatilities.
In other words, if you can buy the 120 calls for 18% implied volatility and sell the 121 calls at 19% implied volatility, and get delta neutral by selling the underlying, then try to undo that spread at even volatilities, you would make money.
In this case, you don't care about actual volatility of the underlying. You are simply trying to buy options cheap, sell them expensive, then undo the spread when they come back into line.