Based on today's closing prices 1.25 b/1.50 a for the Mar 20 puts, the implied volatility (IV) is about 105. The IV will drop by at least 1/3 or to about 70 since the earnings event will have past. An IV of 70 is also the historical IV average.
Based on opening stock price of 20 and IV of 70 you may only see a 0.10-0.15 rise in the Mar 20 put options at most. Depending on how the option pricing goes tomorrow morning, there is a possibility that there is no change in the pricing for the Mar 20 put at all because the options were already priced for a big move up or down.
To answer your question, I think you could get $1.25 for them if the stock opened at $20. That being said, the stock should open up around $17.80 meaning that the $20 put would be worth about $2.50.
Didn't you wish you could just cash in your puts in after hours? Too bad options don't trade after hours. I've seen too many people (including myself), think we have a great gain because the stock fell after hours, but be surprised the next day when it opens alot higher.
Here's a little secret: You can LOCK IN your profits from your put right now. You do that by buying the stock. If the stock falls farther at open, your puts gain in value while your stock loses value, they offset each other. If the stock goes up tomorow, your stock gains value as your put loses it's value.
The amount of stock you should buy to lock in your gains depends on the options "Beta". Read up on it and you'll learn.
Personally, I have no position in this stock, but I do believe it's beaten too far down at $18.00 So I just bought some in after hours because I believe it will bounce by tomorow - maybe due to short covering.