Major League Baseball is charging princely prices for its first games in Britain.
Premium seats at London's Olympic Stadium will cost £385 for the games between the New York Yankees and World Series champion Boston Red Sox on 29 and 30 June. The top non-premium seats near the infield cost £320.
Seats in the outfield corners go for £270 and £220, according to a chart on Ticketmaster's website. The ones behind the outfield fences go for £120.
Tickets in the second deck cost £270, £170, £145, £120, £80, £45 and £30.
A presale for Yankees and Red Sox season ticket holders starts on Friday, and a presale for those who have pre-registered begins on Monday. The general on-sale date is 6 December.
Site of the 2012 Olympics, the publicly-owned stadium in East London was extensively remodelled for West Ham United, which starting playing there in the 2016-17 season.
The club charges £80 to £55 pounds for category A Premier League matches this season, with discounts for club members and lower prices for category B and C games.
Tickets for games between New York and Boston at Yankee Stadium in April range from $550 to $45, according to the team's website, with premium seats costing more. Boston has not yet posted individual game prices on its website.