Nice car! Not a $37k or appraised $45k to me.
Also, I ran across a book yesterday at Barnes & Nobles bookstore called something like Collector's Car Guide 2016. I took some pictures of the pages in the book for mainly A-body values for popular years ranging from 67 - 76 and it says that car's setup in excellent condition #1 is valued at $32k. The higher the number at the top of the page is for the worst the car shape is. #2 = great shape with minor wear showing, #3 = fair shape needs minor work, #4 = needs mechanical and body work, #5 = restorable car needing total restoration, and #6 = parts car value. Hope that gives you a negotiating point to strive for.
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