Is it possible to trade 2 properties for one? If so how does it work

Is it possible to trade 2 properties for one? If so how does it work

Source: www.trulia.com

Do you think that the prospect of new Casino development in Atlantic City will spark up the Brigantine Market?
soon? If so, how will it affect prices. I guess what I am asking is- is this the bottom?
Source: www.trulia.com