I bought calls at .15, after few days bid/ask has been steady at 0/.55. I tried .50, .45, .40, .35, and .30 for days, but bid has always been 0. Finally, yesterday, I tried .25 and after awhile it went through with bid showing large numbers of .05.
I didn't know there's always bids (even at hidden) for ITM. I was worried about the expiration without being able to sell them. Thanks.