...the more likely sale remains the 777 with a larger sale value, and larger market demand...
Except there's very little demand for BA's 777s due to the fact that none of them are standard Boeing fit. They all have BA standard galleys, most don't have a crew rest area (only the RR ones) and the RR ones (Extended Range) don't have the standard flight crew bunk areas. Therefore anyone who buys them would have to spend a small fortune putting them right. The two which went back to Boeing after Sept 11th were a special case based upon some kind of lease-back.