Hmm, "a butt-ton of human souls" looks to be worth 2.8B at LBP. Sounds legit. cat_3nodding
In all seriousness, look at graphs. The price jumps from 500M gold on 27 June to 2.75B on 28 June, and then to 3.5B on 29 June, which was also the day that three were bought. On 01 July, two more were bought at 3.5B. On 03 July, one more was bought at 3.0B. These latest purchases were what fixed the ABP at that high a level.
Timing-wise, it looks like you missed your window to craft this by a week (if you had several hundred million last week). Hopefully other alchemists interested in crafting it won't buy it as such a price or it will show up as a fail in some future RIG.