This is the lowest I've seen to pair up for 16GB. The last lowest was for a GEIL 16GB kit. It's still rather expensive, but definitely better than the average $109.99 + tax/shipping.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820233216
Edit: Sorry about the price mistake. I had my mind elsewhere.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820233216
Edit: Sorry about the price mistake. I had my mind elsewhere.