IIRC, the Ponzol was the last Keilwerth to have traditional rolled tone holes. The "rings" were first on the SX90. I think. In any event, the presence or lack of rolled tone holes doesn't do anything for the sound. "Leveling" might be a bit of an issue.
First, my very, very old interview with Peter Ponzol is at http://www.saxpics.com/Keilwerth-old/Old/pponzol.htm
. Hasn't been taken down, yet.
Second, the auction's been ended. Dunno why. It didn't meet the "buy-it-now" price.
Third, I might have an explanation for pricing. The ad also says, "The bow has been shortened slightly to improve intonation in the lowe [sic] register." That will give a few folks some pause.
Y'know, Gandalfe and Quinn should have their own business. Quinn buys the horns and Gandalfe play-tests them and posts a review. That'd be kewl.