The 3GS is from june 2009. The Atrix was unveiled in january 2011 and hit the market in april 2011. It was considered the top of the line phone in may 2011.

It's useless to compare overpriced flagship phones and say that android phones are as expensive as iPhones. It's just not true. It's like taking a high end desktop PC with the very latest hardware and comparing it to the price tag of the iMac and deduce that PCs are more expensive than Macs.