I'd guess a few, because what's the point really of having a penny difference? If you wanted to spread out your wall to hide your interest, you'd do it with a larger spread, finer grain and maybe tweak the # amount a bit...
Maybe it isn't meant to be inconspicuous. Maybe he wants to trigger panic. Maybe he wants you to think he actually wants to buy MOAR.
An unproven fact could be that this one (1) guy is responsible for all of the wall shuffling over the past few days.
He is the market maker, and we are along for the ride.