PGN database with games of players with ELO 1000 - 2000 I do the research on a difference of players' behaviour on different levels. There is no problem to find games with players rated over 2000 ELO but I lack those below 2000. Does anybody know a source with such games?
You can find a large collection of games played on FICS archived from the superb site: ficsgames.org Here you can find downloads of games based on rating category and type of games.

Edit: Now we also have LiChess giving out all games! Check out database.lichess.org. Even though it is not already categorized into Elo, you can easily do it via a pgn parser program.