Hey Gallo, spdracr39, thanks for the input! In the meantime, the owner went down by €300 to €2200. I asked about swapping the fork for a Pike but he claimed it would unbalance the bike.
I also found what could be a nice alternative:
Cube Stereo 140 HPC Race 29 Black/flashred 2015 - Barracuda
A CUBE Stereo 140 HPC Race 29, with 140mm Pike for €2500. More rugged than the BH Lynx but should still make for a nice all-round bike. Any views?