On Globus, which was flight S7 991 (GH) I just took what was given because by the time I got round to thinking about it, there was nothing left. When I first looked, they wanted RUB400 for seat selection, RUB1,900 for extra legroom seat, and RUB8,000 for Business. Probably should have taken the latter at the price, but somehow I just don't find it worthwhile on European flights. Plus, you get good service in Economy on S7/GH. I was on a Basic fare and checked in about 26 hours before departure. It occurred to me that seat selection might have been free if I had checked in within 24 hours of departure.