Bastens - We are lucky enough to have one of the LEGO City Train Track Splitter 7996 which is now retired. That being said I wouldn't recommend spending over $250 to buy
Lego City Trains Railway Double Crossover Track Points Switch Set 7996 Used
LEGO® Train Double Crossover Track 7996
4DBRIX CROSSOVER TRAIN TRACK Compared to LEGO 7996 - YouTube
Railway system: Passing module, double crossover type | Akiyuki.jp