I've just been on a training course so that I can carry out surveys for the installers, and yes the prices are coming down, however it's more complicated than that. As with all technologies, as the products improved and new ones are brought out the price of the current one falls. Added to this is that the majority of panels are manufactured in Europe so the price of the Euro has to be brought into the equation. The company I work for gives an accurate quote on the day that the quote is sent out, however this can change in either direction within a matter of hours. It's fairly minimal, though, and it's still the right thing to do even with the feed in tariff lowering. Ours are due to go up on the garage roof next week, and as our heating and water is all geothermal we'll be in a very happy position indeed. I can't wait!