Foreclosure Help

I am trying to purchase a foreclosed home. I offered the bank the asking price for the home. The banks agent has yet to present the offer to the bank. He said he waits a week and then presents all offers.
Isn’t that practice a little unethical? Is that the “norm” for foreclosure sales? How long does it usually take a bank to respond to an offer?

Related posts:

1. Does it take banks longer to respond to an offer on a foreclosed home?
2. Foreclosed Homes – A Bargain Home Purchase
3. Considering purchase of a foreclosed home?
4. Real Estate Agents: If I want to purchase a foreclosed home what offer should I make? ?
5. How Low are banks willing to go on foreclosed home?