This model demonstrated to crowd that she was going to sell her bra which she wore before.
Seem like this lady in black shirt were interested at her bra. She was probably checking the Bra whether suit her demand or not.
The lady in black shirt seem not interested at her bra after checking up her bra. Then the model moved on to other buyers.
At last, the Bra had sold to the man at the back of the model. Well, probably no women will want to buy this second hand bra, why don't they go and shop for new bra instead. Only men likes second hand bra, that was why the deal could be made! LOL. By the way, the money which has been raised by this model by selling her bra was sending to a charity. Good job ma'am!