I'm not sure for you locally, but mail order or internet chaparral has good prices. I've never ordered(mail or internet) from them, but I've bought a lot of stuff from them over the years, they are about 120 miles west of me(now) I used to live pretty close to them. there about $20.00 cheaper per tire than my local dealer. I did buy my last set of PPs at 10west where I got my bike, they give me a 10% discount on everything I buy there since I've bought two bikes from them and with my discount I paid $275.00 for both chaparral has them for $235.00
I just checked there website there prices are cheaper if you mail order them from there adds in the back of most motorcycle mags.
105.97 120/70ZR-17
135.97 180/55ZR-17
the fine print says $9.00 per tire for shipping. so you'd be looking at around $260.00. honestly you could probably do better at a local shop around your house, if not I doubt you'd pay too much more and have them the same day.
If you can find pilot powers cheaper than www.sportbiketrackgear.com has them, let us know because they advertise having the lowest prices on these tires, period.
EDIT - $232 shipped....doubt you can beat that.
________ StarryEyed