Not sure, but I think he's looking to sell the Chaffinch to help fund the continued flight of the Cub south. The Cub has been almost rebuilt in Nairobi, a beautiful job. She's about to get some new engine parts fitted (arrived 3 days ago) and then should be good to go.
Please note, that this is what I think is going on - it's not gospel by any means!
I posted the FB link earlier, but not everyone could open it and then the post was moderated (I think, it certainly disappeared).
Cheers, Sam.