I wonder if there are enough DDMS readers who would care about this?
Can't answer on that. You probably have a better idea how much of your readership is from IL. (can you tell from IP?). But I'm assuming that there's as much interest as some of the Amazon deals out there that aren't useful for many.
In any case, after a bit of research, this is probably an error fare to some extent, as it seems to be based off an LX fare and is pricing for UA too. This usually prices about $1000 more