South Portland coop listing for $639K.

5 years ago when I started looking at Fort Greene real estate, I looked at a coop that may have been in this building. Judging from the floorplan, this may have been the unit below it.

Jerry Minsky had the listing back then and the 1100 square foot unit back then may have been asking $350K. It escapes me at the moment.

Now, this unit is asking $639K. Seems like a quick sell to me, based on the strength of the block, floorplan, looks, and pricing. Anyone else agree/disagree? If anything, could this unit be underpriced?