Pehnawa The Indian Clothing

i'm not really clear how this store owner prices their jewelry. there's no price tags. i visited the store on jan 21, and was told that a certain necklace would cost $40. i visited again with my mother today (feb 1) and was told that the same item is now $60! i even have his business card where i wrote down the quoted price of $40, but now he completely denies it! he did the same with another piece of jewelry that we had an eye on. it the store-owner’s prerogative to price their items, but it’s really off-putting (and borderline unethical) to revisit the same shop, only to find out prices have increased by 150% within a matter of 10 days.