Are you an AOPA member? If so, you can use their online Aircraft Valuation Service. I put in the specs you gave and it came back with $30,000. See attachment. Since you said the interior is 10/10 and paint 9.5/10, I put in as New Interior and New Paint.

You didn't list the avionics. They affect the price quite a bit.

Attachments
6411-VREF-1980-C152.jpg (326.04 KB, 25 downloads)

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