Update 7/27/10 - Thank you everyone for participating in the group buy. I think overall it went great. $765 for a set of staggered 19" or 20" tires was a steal.

In comparing prices for tires on Tirerack: For the 9 people that bought 19" tires you saved $443 - $457 compared to an OEM tire choice, and $21 - $411 compared to a non-OEM tire choice. For the 25 people that bought 20" tires you saved $895 compared to the OEM choice, and $167 - $629 compared to a non-OEM tire choice. Using the OEM tires as a guide I estimate that overall we saved about $26,425 in this group buy.