FUD Zilla reports DDR3 demand in 2007 was very low:
DDR3 adoption failed to meet the expectation and created the big problem for many memory vendors. The DDR2 fell to ridiculous prices making it even harder to sell overpriced DDR3 and at the same time Vista boom didn’t happened.
DDR3 prices are going down and 2GB of quality DDR3 1600 is priced between 250 and €300 and went down from €600, but even €250 is way too much if you know that you can buy some quality 2GB DDR2 for about €60.