Very vindictive.

Yes, see if you can get it removed.

If you can't, try putting in what you mentioned but if there's room, also say "Only near offers sought at that price."

On the positive side, as a buyer, if i saw that feedback, it would not turn me off buying, it does not say anything bad about the item or transaction. All it does really is warn other buyers you aren't a push over when it comes to making an offer. If any are thinking of a low ball figure, that may make them revise it up slightly.