Not normal, I wouldn't think. If it has a backup supercapacitor in there, I would suspect that.
The Original 87's, 85's, 83's ran about 330uA in sleep mode if I recall correctly
The 87III about the same,
The 85III had a bug which I have documented showing an initial 345uA or so, then climbing back up to about 800uA, depending on battery condition.
I confirmed this with a second 85III, and I've heard others with this issue, so it was a definite bug.
The 87V is remarkable at around 35uA in sleep mode.