My guess is there was a structure there previously that had to be demolished. My guess is that the bid documents didn't include demolition of the entry features, so it didn't get done.
Maybe buy the lot and put something on it? It tends to imply that the soil is okay since something was (probably) there before...
Obligatory pic - this airplane belongs to a guy who came to me several years ago while I was flight instructing (I got him his Private Pilot certificate). I'll be doing my CFI reinstatement checkride in the same plane most likely...
(remind me to give him some schit for not getting the nosewheel on the parking T)