Every seller has their reasons for selling, there could be a...

Every seller has their reasons for selling, there could be a number of reasons why they are selling, maybe they are selling only a small percentage of what they own to pay for the conversion to heads, maybe an emergency came up and they need the money, maybe they don't hold the same views on GDA that you do, and maybe the sell will disappear before the market opens, seen that happen before.
Maybe the guy selling heads at 2.9 is selling for the same reason.
The one thing I remember from reading Guppy's books was not to be greedy, he likes to take the small nuggets and not hope to find the mother load in every trade, maybe the sellers at this point have already made a nice profit.
In saying all that, I have pulled my sell and will hold for a little longer, we are all different lol