Thanks for bringing this up - the prices are not unreasonable.
A couple of things -
Tried searching ebay for "kr_trains", found no relevant results, then searched for "ETS trains" and it brought up the listings for kr_trains right at the top. Search algorithms amuse me sometimes.
Has anyone bought from Merkur via their website? Last time I checked, it didn't say that they sell/ship to US, but also didn't say that they don't.