So where does everyone that uses them get Hankook Ventus R-S2's...
(Stock 16" size btw... 205/55/R16)
I've checked all the local places, and the lowest quote I got was around $450.

Best online price I found was $360 shipped. That, and I think this might be mis-priced as the company also does ebay stores and such and the price is set a good $40 above that price.

Anyone know of somewhere with a better price?

I ordered my set of Hankooks (in 205/55R16) from www.edgeracing.com for about $360 shipped. Your final cost might be a bit higher or lower, due to shipping costs depending upon where you live. I believe they have a good reputation here and I was very satisfied with their price and service.

Where are you looking?

Edgeracing.com, discounttire.com, vulcantire.com and frisbyracetire.com all sell hankook. $360 seems like a really good price to me.

Got mine from ER.

If the $450 covers the tires and mounting and balancing, that might not be too bad. For me, it's about $80-$90 to mount and balance.