Depending on the upfront $$$ and the royalty rate they offer, the fact that in Europe with the more stringent cost reimbursement polices which will keep Gleevec #1 once it goes generic, and the fact the uprfront $$$ may avoid another dilution, all could sway HB to sign the papers.
I think Berger's "greediness" serves us well now (allows for the greater possibility of buyout, allows us to sell rights later at a much appreciated price etc) but will be to our detriment later (if he tries to go this alone and commercialize this drug or any others throughout the world on his own I think we are looking at some problems)