Since this ended up being a public experiment, the results are now essentially in. All but 1 book now is now auctioned (Action Comics 28 is going up by itself this Sunday).
My GPA-based estimate for the collection was initially $90,000, with the caveat that a lot of these books don't come for sale that often, and many prices had to be inferred from copies that had sold either a while back, or with significantly different grades (e.g. 3.0 vs 6.0). It was also tough to know what the extensively restored Action 23 8.5 would sell for (which ended up being $13,200 or something like that).
In total they auctioned for something very close to $100,000, which, after Heritage seller fees, ends up with a net of about $83,000. Overall they did about what I thought they would, with no real surprises. Lots of new GPA highs, but nothing that would make your eye pop out of your head.
Overall I am satisfied, though in hindsight I do wish I had kept a couple of my favorites. All the proceeds are going to my daughter's college fund, not back into my collection, though I did pick up a copy of Bone 1, which I'd wanted for a while.