Put ITM sell at open?

Pretty new to options. My put went in the money after hours by about $5. I got lucky as hell in the first place that there was a big sell off (-13%). My option expires in two days and was almost worthless. Not looking to see if it keeps going down in the morning as there are already a decent amount of people buying the dip.

Would it be a good idea to have the sell order ready at open? If so, what should I sell it at? I only have 5 contracts so I would assume 500x$5=$2500 to sell the option at? $VanEck Vectors AMT-Free Intermediate Municipal Index ETF (ITM.US)$