Just because Black Friday and Cyber Monday are behind us doesn’t mean the deals are over. The country’s largest retailer, Walmart, is now selling Samsung’s flagship smartphone for an unbelievably low price of just $79. So if you’ve been patiently for a steep price drop to purchase the Galaxy S5, now’s the time to strike. Last week, we reported on a story from the Wall Street Journal suggesting that Samsung produced an excess amount of Galaxy S5 units. Granted, the Galaxy S5 is arguably one of the most popular smartphones currently on the market, but Samsung’s goals were perhaps a little too ambitious for its own good. This prompted the company to make some internal changes, and some analysts are saying the recent price drops are indicative of Samsung’s Galaxy S5 surplus. When supply exceeds demand, conventional wisdom should tell you to drop the price, which is exactly what we’re seeing with retailers like Walmart. From now until Christmas (December 25), consumers can purchase the Samsung Galaxy S5 from Walmart for just $79. That’s a $60 savings from the Galaxy S5’s normal price of $139. Now for the bad news: you must sign a 2-year service agreement to be eligible…