In the U.S., bargaining is mostly reserved for expensive items such as real property, automobiles, furniture, mattresses, major appliances, and so on.
However, other items can be negotiated in some cases. For example, the price of buying almost anything used from a private person is usually negotiable. Some sellers will indicate the price is firm, but this is uncommon. Personal services such as music lessons or yoga classes might be negotiable as well.
If the item being purchased has a salesperson that seems invested in getting you to the make purchase, then the price of that item is probably negotiable.
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