As it is quite common in Cambodia even small cities, such as Svay Rieng have at least one bigger market. You may also find a market in Svay Rieng centre (Phsar Svay Rieng), which is a very busy area with local shops dealing the local daily consumer products, like fish, fruits, vegetables, meats and packed products (a lot from Vietnam). Most of the food and drink shops are surrounding the market.
Bus Ticket Online is available and you can check below: