Circuit City (NYSE: CC) is taking the first steps towards a potential $1 billion merger bid with Blockbuster (NYSE: BBI) by allowing the video rental chain to conduct due diligence. The electronics retailer also received a letter from activist investor Carl Icahn saying that he is prepared to buy the company if Blockbuster cannot secure its own financing on its own or get shareholder approval. The move sent shares more than 5% higher on the day.

This news is music to the ears of Circuit City shareholders. Blockbuster pledged to purchase the company for no less than $6 per share, subject to due diligence. The fact that a standby offer is now in place by Carl Icahn makes a $5+ bid nearly certain. Speculations are now waiting to hear the results of the due diligence. If no problems are found, shares could rally significantly higher to the $6 per share minimum offer.

Blockbuster's move to acquire Circuit City comes amid a continued turmoil in the movie rental business. Competitor Movie Gallery recently filed for Chapter 11 bankruptcy amid increasing competition from video-on-demand and mail-order services like NetFlix (NDAQ: NFLX). Meanwhile, movie piracy continues to rise at a shocking rate and further eat into margins. Blockbuster is hoping that this diversification into electronics would change things.

In the end, it appears that a deal is relatively certain now given the due diligence agreement and Carl Icahn's standby offer. The price of the deal remains at the top of the list of concerns for shareholders, but this won't be determined until due diligence is completed successfully. Combined, these factors make CC a stock worth watching closely!

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