Is Ernst Heinrich Roth Cello B6 Nr 1087 really made in 1977 and how much is it worth?

Yes, the Ernst Heinrich Roth Cello B6 Nr 1087 is indeed reported to have been made in 1977. The value of a Roth cello can vary significantly based on its condition, provenance, and market demand, but it typically ranges from $5,000 to $15,000 or more. For an accurate appraisal, it's best to consult a reputable string instrument dealer or appraiser.