I think the fact that Google, which is currently the most powerful brand on Earth, has such a massive market share in the online search industry needs to be taken into consideration when valuing this domain for potential development as a search engine.
To me it's kind of like valuing HamburgersRus at thousands of dollars to develop as a burger chain in an industry dominated by McDonald's.
There are many factors in the real world which need to be considered when valuing a domain IMO, this is just one of them.