It sounds like you are mostly in the rust monster Midwest, but out in Arizona and SoCal hitches from the 70s look pretty much like new. Our sedans can use hitches going back to 1977 Oldsmobiles, Buicks and Cadillacs and they all work just fine. Last one I bought at a U pull it yard it was $35 and I could reuse the hardware. But it’s been a few years so maybe they’re $45 now? Anyway, back in the day there were a lot of different hitch makers for big sedans because SUVs didn’t really exist for towing, certainly not like today. You can often see several different styles in just one U pull it yard.