有价约因

[经] 有价值的对价, 可估计代价

Valuable \Val"u*a*ble\, a.
1. Having value or worth; possessing qualities which are
useful and esteemed; precious; costly; as, a valuable
horse; valuable land; a valuable cargo.

2. Worthy; estimable; deserving esteem; as, a valuable
friend; a valuable companion.

{Valuable consideration} (Law), an equivalent or compensation
having value given for a thing purchased, as money,
marriage, services, etc. --Blackstone. --Bouvier.