(1)机遇购买
指在货物买卖合同中，买方购买的是取得标的物的机会。无论买方是否取得标的物,他都必须支付固定的价款。通常的例子如购买彩票，彩票即为买主提供了获得奖品的机会。

(2)预约包购(=emptio rei speratae)

• in statu quo
• in statu quo ante bellum
• in statu quo ante fuit
• instigate
• instigation
• instinctive statements
• instinct of self-preservation
• In stipulationibus cum quaeritur quid actum sit verba contra stipulatorem interpretanda sunt.
• In stipulationibus, id tempus spectatur quo contrahimus.
• In stipulationibus quum queritur quid actum sit verba contra stipulatorem interpretanda sunt.
• in stirpes
• institor
• institoria actio
• institorial action
• institorial power
• Instituta Cnuti aliorumque regum Anglorum
• institute
• institute an action
• instituted
• instituted executor
• institute heir
• Institute of International Law
• Institutes of Caius
• Institutes of Coke
• Institutes of Gaius