How can I sell an option when there is no bid?

The option market makers are allowed to post a Bid of "zero" as part of their two sided bid/ask market. If there is no bid for your long option you will not be able to sell it. Also a sell MKT market order can not trade when there is no displayed Bid.  You can wait for a bid to appear and place a Limit order or you may have to hold the position until it expires and is removed from your account after expiration. 

Powered by IBot
Why is my FX Closing trade getting rejected due to low balance?
Why are there no quotes for the Future Option (FOP) I am looking at?
Why did I get a warning message stating "Market Order was Repriced"?
How do I create a Market order in TWS?