売買

1. Origins, structure, and basic meaning

• Structure: 売買 (ばいばい) is an action noun for buying and selling goods or property in exchange for money.
• Basic usage: 土地の売買には書類が必要だ concerns documentary requirements for property transactions, while 中古品を個人間で売買する describes private parties trading used goods.

2. Common pitfalls and similar expressions

• Property transaction and private sale
  • 土地の売買 is a documented property transaction, while 個人間で売買する marks the relationship between trading parties. The term differs from a gift or a loan without sale.