domain Seeking appraisal for investorcasa.com

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Hello guys,
I wanted to know the approx. value for 'investorcasa.com'. I have the following prices from namebio.com. Please advise.

investorcafe.com sold for 4,000 USD
investorz.com sold for 3,988 USD
investorradio.com sold for 3,750 USD
investorroom.com sold for 3,750 USD
homesforinvestors.com sold for 3,288 USD
investorwatch.com sold for 3,000 USD
investorcity.com sold for 2,125 USD