Other reported bidders include patent holding company RPX, Research in Motion, and Ericsson.

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At the moment, the RPX price per square foot for a motivated sale is roughly 40% less than that for a non-motivated sale.

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U.S.-based exits include Assistly, Cloud.com, Facebook, Gluster and RPX.

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The initial public offering of RPX Corp, a San Francisco company that acquires patents to protect technology giants like Google and Cisco from patent lawsuits, marks the latest escalation in the patent wars.

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To determine which cities feature the best real estate deals, we looked at three sets of data in the March 2009 RPX Monthly Housing Market Report, distributed by Radar Logic Incorporated, a New York-based derivatives firm.

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Just last month RPX Corp.

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