I urge you to indulge in the samples offered by the merchants, especially at the dairy stands. Their selection of cheese isn't always wide, but it is very good, and you can taste the difference between shop-bought blocks and the creamy wedges on offer at the market.
Baking wise there's an abundance of locally made bread, deep-filled pies and gluten free cake.
If you're feeling more health-conscious, try the raw food wraps (made of coconut tortilla), filled with avocado and lime hummus, plantain and shredded vegetables.
The Farmers' Market also appeals to the retail therapy hunter in us all. A couple of stalls along the street sell a random selection of ceramics, jewellery, kids clothing and pretty cushion covers, like these pictured below.
The market also has plenty to offer in the way of hot, take-away food. I spotted this new Caribbean stall the other day. They sell ever-popular jerk chicken and scotch bonnet pepper infused sauce which comes with steamed vegetables and rice.
I tend to go there when the train doesn't go as far as Brixton (which it has done many times due to maintenance works), and I always come away with generous, typically organic, selection of fresh produce, all for a fair price too.
After falling for this market I've stopped shopping at the supermarket for groceries. All in favour of the Farmers' Market say aye: aye!