I'll leave the comment from jhue5571 (assuming listia doesn't remove it) in hopes that it may help someone else recognize this simple scam. Somebody wants to win your auction, so they create a dummy account and use it to post a negative comment in hopes that it keeps bids down. If you look at jhue5571 profile you'll see he created his account yesterday and has zero everything.
You might say posting this could inspire others to try this, but I simply think the more people are aware of how scams work, the less effective they'll be.