Win-win investment property deals exist, but lower interest rates raise risk of bad deals

Sometimes, win-win deals do not exist. In trading a pair of currencies, one party benefits from a particular currency strengthening while the counterparty suffers a loss.

In mega corporate and property deals, one often sees both buyer and seller gushing over the merits of the deal. 

However, are win-win investment property deals the realm of fantasy? A seller may want to exit a property because he sees limited scope to add further value, grow rent or increase capital value.