"It's no good, it's no good!" says the buyer – then goes off and boasts about the purchase. (NIV)
It is worthless, it is worthless! says the buyer; but when he goes his way, then he boasts [about his bargain]. (AMP)
It is naught, it is naught, saith the buyer: but when he is gone his way, then he boasteth. (KJV)