Look closely at the animated wheel in the show opener. There is a $250 space on the wheel somewhere. However, the smallest dollar amount on the real wheel is $300. The low prize amount was raised from $250 to $300 some time ago.
This little item wasn't actually discovered by me, but was pointed out to Pat Sajak by a visitor to his site (www.patsajak.com), and Pat mentioned it at the end of the show which aired on January 12th, 2001.