CFD Tickets Committee chairman Jim Gorman says Frontier Days limits purchases of tickets to six per individual.
He says he doesn't like the expensive asking prices on the Internet but there's not much Frontier Days can do about it.
But Gorman said CFD is looking into who bought the tickets that are being offered for such high prices.
Strait is scheduled to play July 18. The country music legend sold out a Frontier Days show in 2004.