I would advise you to simply look at the minutes from the board meetings going back at least six months. See what has been talked about. This will give you some sort of idea of what assessments may come up, but, there are still no guarantees.
Americorp Real Estate
Brokers Associate, e-PRO
Consult your loacl Realtor.
In the meantime, look at it this way...
Would you rather find out there's a problem with a car you're going to buy and have the seller pay for it so it's totally fixed prior to the purchase being made or would you rather going into the sale blind and hope there's not problems down the road?
Pay close attention to the 22.1 disclosure which will tell the tale of the building. Special assesments are not necessarily a bad thing and if the work is done right- it should be one less things to worry about for years to come.