I have him projected out at 24 homers right now. Still at an age where you factor in upside in terms of power, rather than setting a hard cap with age related regression. But yeah, for auction dollar purposes, 24-25 is a great projection. The .300 BA is also nice.
I just don't see a huge difference between Butler and Agon, Goldy, Freeman, Konerko, Rizzo. He'll rank higher on a rater at the end of the season, but in snake drafts, I'd rather fill in other areas at that point in the draft.
This coming from someone who has owned Butler the last 2 seasons in most leagues.