Look what did I found on Goodluckbuy.
http://www.goodluckbuy.com/bmp085-barometric-digital-pressure-sensor-module-board.html - 18.79usd
http://www.goodluckbuy.com/gy-29-accelerometer-sensor-module-adxl345-arduino-axis.html - 10.87usd
Before anyone asks, i'm not related to Goodluckbuy, but I can confirm that they are a legit shop, I ordered around twelve times and everything arrived.
Just add a wm+ clone with itg3205 from Dealextreme and an aurdino nano (Booth Dx and Goodluck has them on stock) and you are ready to fly....