Striking Gold at swap meet

I agree if it is a swap worth being at , be there when the gates open, or better yet, IF at the Nats, buy a vendor space and be there when they let vendors in the day before.
I always had my parts priced to sell, I would sell more parts on Thur afternoon than the other fri and sat combined. Many of the parts I sold were bought by other vendors and marked up, many times those same parts went home with them on Sun!! ha