Atlanta is one team that might be willing to take on Biedrins and send a couple expiring contracts to Memphis.
Atlanta has only $18MM in salary committed for next season (and a lot of roster spots to fill). Unless they think they're going to sign a couple max free agents, it may not take a ton of incentive for them to swap expirings for Biedrins--a guy who expires next year and who can (along with Pachulia) allow Horford to play PF next season.
I imagine that Rush would be a pretty attractive piece to Atlanta and the Warriors have to send out more than just Barnes and Biedrins/Jefferson in order to match Gay's salary.
GS trades Barnes, Biedrins, Rush for Gay, Wroten, Scott