Getting new tires.. 10000 miles earlier than expected...

Well, my Nexens still have 20 - 30% tread left after 30k miles but one of my tires is leaking air.. I have repaired it before and it stopped leaking but it is leaking again (right rear).. Now, I went to have dinner and just before I arrived back home, I hear a noise from the rear and it appears that I drove over something (which turned out to be some kind of metal tube) which almost instantly deflated my left rear tires.. I put a patch into the tire but the hole was so big that despite the patch, it's still leaking. Now, my tires are down to about 20 -30% already and Tire Kingdom has a special on the Nexen's right now with $75 if I buy all 4, so I decided to replace all 4 instead of just the 2 bad ones. The quote shows total cost after tax, installed $495.75..

 

i wish that I could have gotten a deal like that..