I think that if what you are saying is true, then you should consider selling it as soon as possible and as little used as it hopefully is.
How soon is soon enough for you?
What if they were to tell you that an update to 4.3 is not likely to be achieved this year? Would it be too much to wait?
What about next spring or summer?
Based on what I read about it so far, which includes the unofficial 4.4 testings, I doubt that FP will be upgraded to 4.3 “soon enough” or even at all.
Bye 