请帮忙将这段话译成英语,购买合同的细节已经商议好,不如即可签字生效.

Since the detail in the Purchase Agreement （或Contract）has been fully negotiated,how about let's just sign and put it into effect right away?
如果是"不日即可签字生效“,整句话语气就不同了.
可以写为：
The detail in the Purchase Agreement has been fully negotiated and it will soon be signed and put into effect.

The details of purchasing contract have been conferred well , it will become effective soon.

The purchase of the details of the contract has been agreed, will soon be in force
望采纳！O(∩_∩)O谢谢！