I had GIII's and they lasted 19000k's.
Now i have A539's and they aren't as grippy (maybe 20% less), but should last alot longer. I used them at a track day recently, and they were good, but not as good as the GIII's.
I paid $180 each for my 225/60/R15 GIII's, and $125 for my 215/60/R15 A539's.
I agree with Big T and say- get Falken ST-115 for $130, if they are that cheap. Great grip with great life. Damn that's cheap!