How low can Google go? The Mountain View, California-based company blew open the Android tablet market with the $199 Nexus 7 slate earlier this year, but Google (GOOG) is apparently just getting started. The firm added a high-end tablet to its repertoire earlier this week when it unveiled the Nexus 10 with an HD display, but rumors also swirled that the company had a new $99 Nexus slate in the works. Now, Digitimes reaffirms its earlier claims in stating Google is currently prepping an “entry-level Nexus tablet that has not yet been announced.” No additional details were provided.