Discount Tire all the way to get tires. Either a shop near you or discounttiredirect.com. They'll match anyone else and usually discount it slightly if you talk to them.
What are your needs? Where will you be driving?
Can't really not pick up a deal like that one.I bought a set of duratracs off Craigslist for $600 with 600 miles on them. They were on a Dodge with a blown engine. I love them. I would look around before you drop the cash. I got an exceptional deal, but there are others out there too. It was a little more of a hassle than just buying and no warranty, but the treadware warranties are bull sh!t anyway.