I generally agree... But we are missing some important context.
If it was listed for more and the buyer pretended they were struggling/needed it to get them to drive the price down, I can understand the sellers reaction.
And if they're an avid user of marketplace they may not have been stalking, just noticed "hey, that's my dresser, and that seller is the lady I sold to" as they navigate through the items.
In saying all that... They could just as equally have realised they messed up and are bitter about it.
Can't really make a clear judgement on the info at hand