The time value on your option is about 1.09 based on the close of 2.85 ask. The extrinisic value of your option includes this time in the option pricing in addition to the intrinsic value. For another month out on this option, you are only getting $1 more of premium in your sale. There is a good amount of o/i on this option that could create overhead resistance for the underlying, but that's a while away. Not to be argumentative, but IMHO I think you want to reconsider your too good to be true statement. Based on something I use to calculate option prices, I think you should have gotten over 3.5 to have gotten the fair price.
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