Sadly that is not uncommon these days at all.

For major arena shows, face price floor seats can easily run $500+, going up to $1000+ for the first rows. Even lower level bowl seats can run you that much for front row.

And that's if you managed to get scalpers to them during the original sale. Resale can commonly range as high as 200% - 500% of face price.

For example, for Nine Inch Nails' recent arena tour, face price for pit tickets (GA floor) were around $150-$200, depending on the city. But they were nearly impossible to get, so most fans ended up having getting them on resale, where prices of $300 - $400 dollars were common. You can wait for tickets to drop the day of the show but that doesn't always happen. I know someone who ended up paying $800 for a pit ticket on the day of the show after they shot up to over $1200 at one point.

It is frankly completely out of control.