10ドルでどう？

Would you do 10$ & I'll purchase

10ドルでどう？　それなら買うよ

Sorry, thats too low.

ごめん、安すぎですわ

How about $13?

13ドルでどう？

Okay I'll do 13$

13ドルで手を打とう

When will my item be shipped?

発送はいつの予定？

It'll be shipped tomorrow

明日発送するつもりだよ