I've rotated the tires every 6,000 miles, so two have about 21,000 miles, one has 18,000 and two have about 15,000 miles. The two with 21,000 miles:

http://i17.photobucket.com/albums/b53/UF92134/Tires4Sale/P1020366.jpg

The one on the left has 18,000 miles, the two on the right have 15,000 miles:

http://i17.photobucket.com/albums/b53/UF92134/Tires4Sale/P1020367.jpg

I think each tire should have 30,000 to 40,000 miles of life left in them, so if you continue to rotate them, you should be able to get 40,000 to 50,000 miles from the set. This shows the tread depth on the tire after 18,000 miles:

http://i17.photobucket.com/albums/b53/UF92134/Tires4Sale/P1020374.jpg

In the interest of full disclosure, one tire was punctured and professionally patched (not just plugged). I've had no problems with balancing or vibrations since the repair:

http://i17.photobucket.com/albums/b53/UF92134/Tires4Sale/P1020376.jpg

$200 or best offer plus shipping from Los Angeles (91040).