With all but one berth for the 2015 MLB postseason clinched, fans from around the country can start planning their treks to the ballpark to root on their favorite clubs. The playoffs will begin Tuesday when the American League holds its one-game wild card, followed by the National League’s on Wednesday.

But the price will be very steep and many fans will have to turn to the secondary market to purchase single-game tickets. Especially if they happen to support the Chicago Cubs.

According to a recent report from blog TiqIQ, a single seat for Chicago’s one-game wild card playoff is going for $849.87, which is $600 more than the Pittsburgh Pirates at $268.62.

It’s an astronomical amount for the average Cubs fan, but resellers are banking on the team’s string of poor performances and hence the scarcity of a postseason appearance. Chicago’s bound for the postseason for the first time since 2008, and they are considered contenders for the World Series this year.

The Cubs organization, fully aware of how high demand is for tickets, ran a lottery that allowed winning fans the opportunity to purchase tickets online from Sept. 10 to Sept. 23.

Chicago was also worried about counterfeiters exploiting fans on the secondary market. The team requested fans not show off their tickets on social media to ensure they won’t be copied and reproduced.

Should the Cubs prevail over likely opponent Pittsburgh, another ticket for Games 1 or 2 of the National League Division Series versus the St. Louis Cardinals is averaging $830.21. In contrast, a Pirates NLDS ticket runs for $276.76, one for the Cardinals is $236.47, and for the New York Mets its $353.33.

There are, however, cheaper opportunities. For example, a single ticket for Game 1 of the Los Angeles Dodgers and Mets NLDS matchup is running from $9,999 to as little as $41.16, according to a recent search on StubHub.

Over in the AL, which still features the Los Angeles, Minnesota Twins, and Houston Astros fighting for the final wild card berth, the prices are more in line with what the Mets are charging.

Like the Cubs, the hard-hitting Toronto Blue Jays are returning to the postseason for the first time in 21 years and odds makers have pegged them as World Series favorites for the last two months. The Blue Jays don’t know who they will play in the ALDS just yet, but one seat is costing on average $391.31.

The defending AL champion Kansas City Royals, who just last year snapped a 29-year playoff drought, are seeming tickets fly on the secondary market for $365.12.

The New York Yankees just clinched a playoff berth on Thursday night, but they started a postseason pre-sale late last month and urged fans to avoid the secondary market’s high prices. On average, a seat for New York’s wild card matchup went for $192.69.

But StubHub does provide some better deals for Yankees fans. Tickets along the grandstand, terrace, and bleacher sections for the wild card in Yankee Stadium are still in the reasonable $70 to $50 range.