The bowling ball market is really hard to measure. I am selling a lot of NIB older Ebonite stuff, Mission, The One, The One Pearl, Angular One, etc. I sold one of those balls for $250 plus shipping, and others aren't getting bites at $225 shipped. Now, obviously, used balls will bring even less, but you never know what you can get. If you find the right buyer who loved the purple Vibe and is desperate to find another, you may get $100 plus for it even though it's used. At the same time, you may have people claiming you're nuts if you ask anything more than $60 shipped. Like so many other things in life, it comes down to timing and a little bit of luck.