Firms in a perfectly competitive market are said to be "price takers"-that is, once the market determines an equilibrium price for the product, firms must accept this price. If you sell a product in a perfectly competitive market, but you are not happy with its price, would you raise the price, even by a cent?

No, you wouldn't raise the price, not even by a cent.

Explanation:

The equilibrium price in a perfectly competitive market means that, when goods are sold at that price, there is no excess or shortage of the goods. The demand and the supply are equal.

If you were to rise your price above the equilibrium price, then the consumers will prefer to buy their goods from the rest of the firms that are selling at the equilibrium price. Your supply wouldn't sell. You would eventually be forced to accept selling your goods at the equilibrium price.