No clue what I'd pay, but I've seen one listed for $999. Will they get that? Who knows. It's all subjective I suppose. Just gotta find someone who wants it bad enough.

It's a cool and unique ball, but I don't understand why people would be willing to pay several hundred for one.

It is actually better then a 10 pin ball. I had the Double Helix I drilled and used back in 2007 and PK18 in any era will be plenty. Pk17 is no different. With the craze for urethane still in the air somewhat the ball would be very beneficial for medium to lighter oiled conditions which is what the ball has always been. The price is what makes it hard to justify.

I have a friend that would pay up to $400 for a nib one in 15lbs. I'd personally go $200. I sold my used Double Helix in 2012 for $220 shipped on ebay. Started it at a dollar and watched it go. It was in mint condition and a great ball. The money was worth more then the ball to me.

Used depending on the condition and a bowlers span I could see going $40-70.