This article reveals the most expensive and cheapest games for the MLS season, as we analyzed all avaiable tickets on StubHub.
sportshandle.com
Much cheaper than that.
Ticket masters has phily games in Eastern SF and many are cheaper than that.
Maybe Miami/LA/NY have those prices as normal, but I don't see such prices as regular for MLS.
NFL is the one that have such high prices, but NFL regular season is 8 or 9 home games, with preseason taking them to 10. With 0 (for majority of teams) to 3 (rare) at post season. So, there is scarcity in comparison to football, with 19 home games in league alone, then CDR and CL in account.
200€ is just too much. But it is the return excitement and there is limited seats. So, it is understandable, supply and demand.