What to buy:
It's very simple. There is nothing special to buy here. On the other hand, this town is full of restaurants. Around noon you can smell mussels everywhere... Lots of restaurants and so there is a lot of competition... lunching or having dinner here is very cheap.
What to pay: For instance one can have mussels between €7.90 and €11 euro.
Each Sunday, along the Somme, there is the market. The vendors sell food, kitchen ustensiles, clothes, gifts, jewels, sun glasses, etc...
What to pay: Cheap