14K miles?! https://losangeles.craigslist.org/lac/cto/d/duarte-1976-buick-electramiles-original/6785272037.html
Welcome to the wonderful world of bazaar seat fabrics and patterns of the ‘70’s. That’s actually kinda mild when you think of some of the seating options that were offered by the big three, and AMC for that matter. I think Cadillac took the the prize for some of the most unique offerings. That 1970 Dynasty cloth pattern along was over the top. It looked like your great Grandmother’s Victorian sofa.
If the "8truck" (8-track) has never been used, how does he know it's working perfectly? I'd guess that a mechanical component like an an 8-track player that's 43 years old and has never been used might very well NOT work if you stuck a tape in it.