I think I paid under $90 for Terraforming Mars here:
http://www.gamespeopleplay.ca/home.html
I try to support the brick and mortar stores - Revolution and Sentry Box offer points towards future purchases. Spend $100 at Revolution and get $10 credit. Not sure how the Sentry Box card works. Sentry Box has a good Boxing Day sale each year (but two games, get one free I think).
I did not know about the new store:
http://www.imaginarywars.com/about/