Just be careful ordering from places like that on ebay. You can get seats similar to that from Summit or Jegs it may cost alittle more but at least if something is wrong you can return them without any trouble. $100 is worth peace of mind to me! Oh and the seats actually ship UPS oversize so if you order them from Summit or Jegs it only cost like $6 per seat not $140 they just rip you to make there money.
If you use an aluminum or plastic race bucket, be ready to get beat up every time you drive the car. There is not nearly enough padding or give in those things.