(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)

• fish for evidence
• fishing bill
• fishing expedition
• fishing licence
• fishing preserve
• fishing right
• fishing trip
• fish royal
• fisk
• fist-law
• fistuca
• fistula
• fithwite
• Fit juris et seisinae conjunctio.
• fitness
• fitness for particular purpose
• fitness of parent
• fittings
• fitz
• Fitzgerald's (Vesey) Act
• five civilized tribes
• Five Mile Act
• Five Ports
• fix
• fix by law