NEW YORK (TheStreet) -- If you wanted to buy Facebook (FB) - Get Report and found it too expensive, now is the time to buy thanks to the stock's post-earnings drop, said Jim Cramer.

Cramer said the Action Alerts PLUS holding's new video service was spoken of very highly by management during the company's conference call. They also touted 3-D video, which Cramer says will be coming in 2016.

However, Cramer said the "important thing you need to know about Facebook is that it ran up tremendously ahead of the quarter" and that "last time it did that the stock dropped 8%." Cramer predicts this is what Facebook shares will do again and said investors should buy it after the next 8% drop. His AAP portfolio has a $3.75 per share earnings estimate for Facebook in 2017. Assuming a 30 times earnings multiple, Cramer said he will "hold on" to Facebook.

Sticking with tech, another viewer wanted to know if Microsoft (MSFT) - Get Report is the new Apple (AAPL) - Get Report. Cramer said that's "a hard call" because "we don't really know what Satya Nadella is going to do." Cramer says that if CEO Nadella can get to $18 billion in cloud revenue in a couple of years, "then you're really going to want to own Microsoft right now."

On NXP Semiconductors (NXPI) - Get Report, Cramer said the company "did much better because they had 'Near Field Communications,' which is payments, and they also have auto" but also because the company is much less cellphone-driven than the other semiconductor companies. Cramer added that Qorvo (QRVO) - Get Report, an NXP competitor, "did not have a good quarter, by its own admission, on some wireless infrastructure, especially in China."

Can Blue Buffalo Pet Products  (BUFF) become the Chipotle (CMG) - Get Report of pet foods? "As someone who uses it, that wouldn't shock me,' Cramer said. "I'm trying to get a valuation of that versus Freshpet (FRPT) - Get Report," but has not been able to do so yet. However, Cramer called Blue Buffalo the "Whole Foods (WFM) of the pet food group."

Finally, on Trinity Industries (TRN) - Get Report, Cramer said he is "not as big a fan of the railroads to begin with" and that if Trinity is "going to make tank cars for oil, they ought to pay attention to the fact that the pipelines are almost built out for the Bakken" shale region. Cramer said this buildout will mean that "we will be shipping out much less oil by rail" and that this is "a distinct negative for Trinity."

At the time of publication, Cramer's Action Alerts PLUS had a position in AAPL and FB.