I know the landtool has some changes to it, but that preflight thing only really sends a "success" message along with tons of xml that is not necessary. That being somehow broken I can see, since it's not standard, but it never gets to that point as the button "Buy land" is just not enabled and the pie menu has "Buy land" greyed out too.
I can set some land for sale to you on ZetaWorlds, that's no problem.

* And no one is asking for you to parse OpenSim code mess, I'll happily poke around there and document what needs documenting. Least I can do
