“Bad, bad,” says the buyer, but when he goes away, then he boasts.
See here 1. What arts men use to get a good bargain and to buy cheap. They not only cheapen carelessly, as if they had no need, no mind for the commodity, when perhaps they cannot go without it (there may be prudence in that), but they vilify and run down that which yet they know to be of value; they cry, "It is naught...
It is naught, it is naught, saith the buyer,.... When he comes to the shop of the seller, or to market to buy goods, he undervalues them, says they are not so good as they should be, nor so cheap as he can buy them at; but when he is gone his way, then he boasteth; after he has brought the seller to as low...
when . . . his way--implying that he goes about boasting of his bargains.