Day 8 update.
I carefully inspected my 5 maybe eggs and took a very quick peek at the others.
3 of the maybe eggs were removed. Of those 2 were clears, one was a blood ring. Egg-topsy showed they were all no-gos. All 3 were the Lemon Orp. eggs (kind of an fitting name for them, as it turns out) that I thought were quite old based on the air sacs. I fear the seller was just clearing inventory on these Next time I'm going to ask how old the eggs were.
1, I left in the maybe group. 90% sure I'm seeing a blood ring, but it didn't smell, so it gets another couple of day.
The last one was tentatively moved to the "good" pile -- My last of the Lemons. There is something that looks like a blood ring, but on close inspection, I could see a black dot with veining, so I think it still may be OK.
I took a very quick look at the rest. Sadly, I'm pretty sure I saw another blood ring, so that got moved to the maybe pile to check in a couple of days.
So that leaves me with 10 hopeful eggs left -- 5 orp. eggs and 5 maran eggs. The maran eggs I am still taking largely on faith, although in a couple of them I was able to see some clear movement.
This is a very different experience than hatching backyard eggs, where finding a clear or a quitter is very uncommon.