What about if it wasn’t out-right selling and instead an auction where the starting price is a low static value (say 1000 coin) + 100 coin paid to start the auction and the highest bid is paid to the owner less 10, 15% or 20%.
Once the auction is started it cannot be undone unless the original owner bids on it and wins (in effect paying the 100 coin setup fee and the sale tax).
This way the interested players set the value based on demand for the parcel, rather than the seller. This would also introduce a coin sink with the taxes that would be healthy for the economy.
Additionally when a beacon expires or is released by it’s owner, it could by default enter this auction phase for some time in which case if people do bid on it, it’s a 100% coin sink which is even better! If no one bids on it, the deconstruction happens like it does today. This also helps combat the system of trade sales since the final plot is going to default into auction mode.
No matter what the outcome here, I’d still like the option to release ownership outright to a land owners own alts.