He's been using that one for years. Silhouette Bass (baritone) guitar with a FLOYD! He uses it for Back in the Saddle. Brad Whitford loves his reflex Gamechanger and was the first non-EVH guitarist I was aware of using the EVH/Axis guitar back in the early 90s.
While I think it's great if an artist wants to auction off gear that has is associated with them for charity, I also recognize that the fame they have doesn't automatically mean that they are fabulously wealthy. (Many are, but many aren't, too.) Free/cheap gear is part of how they're rewarded for their accomplishment as musicians, so I don't begrudge them selling it off to improve their financial circumstances when they feel the need.