There is a good market on the Ddomtien in the soi 5 area. In the evenings, a food court is set up on the market square, where you can taste Thai cuisine inexpensively.
A great market for locals: A gourmet Mecca, fruits, vegetables are twice as cheap as in the city. There are also seafood, shrimp at reasonable prices, fresh, still alive fish. In general, the market, with Asian highlights, I recommend as a micro-excursion
A large food market. You can buy unripe fruits for the road. There are vegetables, fruits, meat, fish and greens. You can also buy a fruit basket there.