i believe i paid $300 for the set from motorcycle superstore (140 for the front, 160 for the rear). one dealership would not install, another would. charged $80 per tire in labor, then disposal and shop fees, etc. came to $200. so it was $500 when all was said and done for me. next time i will get a quote from the dealer to compare. may be cheaper that route.
As I recall my current set of PR3's installed was right at $425 and very much worth it. From the looks of 'em I'll need another set in a couple of months right around the 12k mile mark.