It's not just the iPhone 6 that had its price adjusted, most items have been increased to account for currency fluctuations. This includes iPhone, iMac, iPad, and MacBook computers.
Apple has also adjusted prices in the App Store due to the currency issues.
If you thought buying Apple products in the US was an expensive endeavor, buying them now in Russia is difficult to justify. Apple sold approximately 1.6 million iPhones in Russia in 2013, but at these prices it is likely to see a significant drop in sales.