What's the Difference Between a Seller's Market and a Buyers Market?

There's only two types of markets in this world, sell hers market, an the buyers market. Even luxury items has become a seller's market where you just buy it if you can afford it. A gentleman was talking to Anma about how he wanted his business to be more like a flea market and less like a stock market. He suggested that agriculture should be sold with buyers rather than sellers.