Thanks Opus17 and TaxGuyBill for your advice. Selling part in 2018 makes sense, but I'm definitely scared of CA not letting any of my income go un-taxed by stat...

Thank you. I appreciate the advice - it gives me assurance that I'm on the right track. I will consult a CPA to make sure I'm taking all tax factors into accoun...

Sorry for not being clear. The cost basis was very low (about $20,000), so gain is almost$1000000.