Don't think it's turned up yet, but on Jack's (real)* last episode, there was indeed a three-way tie. Or so I remember it being mentioned.
When the AG began, didn't contestants take two spins?
* - as opposed to the 1984 episode on the trading circuit that someone claimed was his last...it was one of what turned out to be a series where someone dubbed The Savers intro and closing over the show's opening and end credits.