As a buyer mostly I feel stuck with Feebay and frequently find what I need there. I too look for M body stuff sometimes and the NOS stuff is usually ridiculously priced and it's the same few sellers. And so many sellers use Keyword Spamming now so it's so friggin annoying. They list every car ever manufactured under "Interchange Part Numbers", "Superseded Part Numbers" and "Manufacturer Part Numbers" so thousands of things pop up. Example; I was looking yesterday at NOS Mopar parts and among other crap a pocket cigarette lighter came up because they had listed "Dodge Charger" under "Manufacturer Part Number".

As an infrequent seller I feel stuck with Feebay too. Where else do you get this kind of marketing? But I hate it and wish we could put the pinch on them.