ebay tires

Hey guys I just came across this guy selling tires on ebay and was wondering if this is a good deal? They are brand new Yok competition tires brand new never mounted. 4 for 298? HERE is the link.
http://www.ebay.com/itm/4-NEW-225-5...che|Model:Boxster&vxp=mtr&hash=item231979a1c7
Are these tires any good?
Seth

Tire Rack offers customer feedback and test results of most of the tires out there on their website. You can also compare their price to what is on eBay.