I understand that the management company changed not too long ago and they are making good improvements to the building.
Change is what's happening over there. I would be curious to know if there was a large assessment recently done for the common area improvements. Sometimes that is all it takes for a long term owner to say, "I think it is time for me to sell".
That building has always had a lot of turnover as it's an attractive buy and works well for graduate students and professors
If there is something bigger, and you are buying, ask for one year of board minutes and obviously the financials of the condo association.