Doomsday,
In reality, you are probably going to be better off simply demolishing to get the value back. You might get someone willing to pay the value or a bit more but unlikely to make much profit. 18X18 plots out in the sticks are not scarce on Siege, and it is less hassle to find a spot and place rather than do a trade for most people.
I placed an 18X18 in a better spot than that ("better" in terms of proximity to a moongate) within 10 minutes of reactivating one of my accounts a few months ago.
Also...I suggest you visit the Homes & Castles forum even in its current bare bones state on these new, hopefully temporary forums.
-Skylark