Here is my take. 1. If what you ask for was completely out of budget, they would not have spent time interviewing you. 2. If you are happy with $30 but still

Here is my take. 1. If what you ask for was completely out of budget, they would not have spent time interviewing you. 2. If you are happy with $30 but still quoted $40, and now you accept $30, you are opening a can of worms. It means, you CAN and WILL be pushed around financially as long as you are in the company. 3. If you have faith in your skills, walk away. You will always find another company willing to pay you the money you ask for, as long as it is realistic. If I was in your place, I would have walked away if it was a penny under $40.