Last fall I bought a Yukon Tracks "Enforcer Elite" blind. Shipped to the house it was just under $225.00. The Enforcer Elite series is 70" x 70", with a height of 80", and has more than ample windows. I'm tall, so head room is very important to me. Yukon Tracks also has smaller blinds which are also very affordable.
Check them out:
http://www.getyukontracks.com/home_yu.asp